./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe014_power.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/safe014_power.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:56:18,702 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:56:18,859 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:56:18,862 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:56:18,863 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:56:18,877 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:56:18,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:56:18,878 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:56:18,878 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:56:18,878 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:56:18,879 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:56:18,879 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:56:18,879 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:56:18,880 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:56:18,880 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:56:18,880 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:56:18,881 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:56:18,881 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:56:18,881 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:56:18,882 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:56:18,882 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:56:18,882 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:56:18,883 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:56:18,883 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:56:18,883 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:56:18,884 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:56:18,884 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:56:18,884 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:56:18,884 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:56:18,885 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:56:18,885 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:56:18,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:56:18,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:56:18,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:56:18,886 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:56:18,886 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:56:18,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:56:18,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:56:18,887 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:56:18,887 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:56:18,888 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:56:18,888 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:56:18,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:56:18,888 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:56:19,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:56:19,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:56:19,087 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:56:19,089 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:56:19,089 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:56:19,090 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe014_power.oepc.yml/witness.yml [2024-06-27 18:56:19,297 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:56:19,312 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:56:19,313 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-27 18:56:20,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:56:20,675 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:56:20,675 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i [2024-06-27 18:56:20,692 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb0bb46aa/0a00c313eee74528b380d29fea486ef7/FLAGff8e1c291 [2024-06-27 18:56:20,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb0bb46aa/0a00c313eee74528b380d29fea486ef7 [2024-06-27 18:56:20,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:56:20,704 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:56:20,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:56:20,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:56:20,708 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:56:20,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:19" (1/2) ... [2024-06-27 18:56:20,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea08c7a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:20, skipping insertion in model container [2024-06-27 18:56:20,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:19" (1/2) ... [2024-06-27 18:56:20,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b25b512 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:56:20, skipping insertion in model container [2024-06-27 18:56:20,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:56:20" (2/2) ... [2024-06-27 18:56:20,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea08c7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:20, skipping insertion in model container [2024-06-27 18:56:20,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:56:20" (2/2) ... [2024-06-27 18:56:20,711 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:56:20,840 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:56:20,841 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:56:20,841 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:56:20,841 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((((((((((((((((((((! multithreaded || (y == 0 || y == 1)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2))) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && (*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1))))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0) [2024-06-27 18:56:20,841 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:56:20,842 INFO L106 edCorrectnessWitness]: ghost_update [L836-L836] multithreaded = 1; [2024-06-27 18:56:20,865 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:56:20,982 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i[995,1008] [2024-06-27 18:56:21,130 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:56:21,144 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:56:21,180 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_power.oepc.i[995,1008] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:56:21,285 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:56:21,323 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:56:21,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21 WrapperNode [2024-06-27 18:56:21,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:56:21,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:56:21,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:56:21,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:56:21,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,393 INFO L138 Inliner]: procedures = 175, calls = 69, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 170 [2024-06-27 18:56:21,394 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:56:21,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:56:21,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:56:21,395 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:56:21,403 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,404 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,407 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,421 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 5 writes are split as follows [0, 5]. [2024-06-27 18:56:21,421 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,431 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,433 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,450 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:56:21,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:56:21,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:56:21,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:56:21,455 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (1/1) ... [2024-06-27 18:56:21,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:56:21,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:56:21,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:56:21,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:56:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 18:56:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 18:56:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 18:56:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 18:56:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:56:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:56:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:56:21,543 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:56:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:56:21,543 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:56:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:56:21,544 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:56:21,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:56:21,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 18:56:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:56:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:56:21,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:56:21,548 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:56:21,685 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:56:21,686 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:56:22,163 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:56:22,163 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:56:22,485 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:56:22,486 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:56:22,486 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:56:22 BoogieIcfgContainer [2024-06-27 18:56:22,486 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:56:22,488 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:56:22,488 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:56:22,490 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:56:22,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:56:19" (1/4) ... [2024-06-27 18:56:22,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dcef78 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:56:22, skipping insertion in model container [2024-06-27 18:56:22,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:56:20" (2/4) ... [2024-06-27 18:56:22,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dcef78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:56:22, skipping insertion in model container [2024-06-27 18:56:22,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:56:21" (3/4) ... [2024-06-27 18:56:22,492 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44dcef78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:56:22, skipping insertion in model container [2024-06-27 18:56:22,492 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:56:22" (4/4) ... [2024-06-27 18:56:22,493 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_power.oepc.i [2024-06-27 18:56:22,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:56:22,507 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 18:56:22,507 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:56:22,565 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:56:22,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:56:22,627 INFO L124 PetriNetUnfolderBase]: 1/44 cut-off events. [2024-06-27 18:56:22,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:56:22,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 44 events. 1/44 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-06-27 18:56:22,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 47 transitions, 106 flow [2024-06-27 18:56:22,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 51 places, 41 transitions, 91 flow [2024-06-27 18:56:22,648 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:56:22,658 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@74588890, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:56:22,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-06-27 18:56:22,667 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:56:22,667 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 18:56:22,667 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:56:22,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:22,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:56:22,669 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:22,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:22,673 INFO L85 PathProgramCache]: Analyzing trace with hash 642988262, now seen corresponding path program 1 times [2024-06-27 18:56:22,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:22,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341481273] [2024-06-27 18:56:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:22,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:24,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:24,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341481273] [2024-06-27 18:56:24,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341481273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:24,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:24,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:56:24,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310378519] [2024-06-27 18:56:24,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:24,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:56:24,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:56:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:56:24,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:56:24,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:24,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:24,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:56:24,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:25,078 INFO L124 PetriNetUnfolderBase]: 2180/3473 cut-off events. [2024-06-27 18:56:25,078 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-27 18:56:25,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6726 conditions, 3473 events. 2180/3473 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 19739 event pairs, 1317 based on Foata normal form. 0/3340 useless extension candidates. Maximal degree in co-relation 6714. Up to 3184 conditions per place. [2024-06-27 18:56:25,096 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 43 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-27 18:56:25,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 58 transitions, 227 flow [2024-06-27 18:56:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:56:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:56:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-27 18:56:25,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6595744680851063 [2024-06-27 18:56:25,106 INFO L175 Difference]: Start difference. First operand has 51 places, 41 transitions, 91 flow. Second operand 3 states and 93 transitions. [2024-06-27 18:56:25,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 58 transitions, 227 flow [2024-06-27 18:56:25,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:25,110 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 125 flow [2024-06-27 18:56:25,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-27 18:56:25,114 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2024-06-27 18:56:25,114 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 125 flow [2024-06-27 18:56:25,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:25,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:25,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:25,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:56:25,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:25,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:25,116 INFO L85 PathProgramCache]: Analyzing trace with hash -563545179, now seen corresponding path program 1 times [2024-06-27 18:56:25,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:25,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166372427] [2024-06-27 18:56:25,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:25,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:25,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:27,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:27,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166372427] [2024-06-27 18:56:27,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166372427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:27,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:27,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:56:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846095763] [2024-06-27 18:56:27,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:27,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:56:27,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:27,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:56:27,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:56:27,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 47 [2024-06-27 18:56:27,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:27,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:27,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 47 [2024-06-27 18:56:27,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:28,008 INFO L124 PetriNetUnfolderBase]: 2174/3323 cut-off events. [2024-06-27 18:56:28,008 INFO L125 PetriNetUnfolderBase]: For 604/614 co-relation queries the response was YES. [2024-06-27 18:56:28,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7442 conditions, 3323 events. 2174/3323 cut-off events. For 604/614 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 18151 event pairs, 893 based on Foata normal form. 6/3323 useless extension candidates. Maximal degree in co-relation 7430. Up to 3142 conditions per place. [2024-06-27 18:56:28,023 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 60 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-27 18:56:28,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 355 flow [2024-06-27 18:56:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:56:28,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:56:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-27 18:56:28,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6702127659574468 [2024-06-27 18:56:28,025 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 125 flow. Second operand 4 states and 126 transitions. [2024-06-27 18:56:28,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 355 flow [2024-06-27 18:56:28,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:28,027 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 188 flow [2024-06-27 18:56:28,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 18:56:28,028 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2024-06-27 18:56:28,028 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 188 flow [2024-06-27 18:56:28,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:28,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:28,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:28,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:56:28,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:28,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:28,030 INFO L85 PathProgramCache]: Analyzing trace with hash 453590457, now seen corresponding path program 1 times [2024-06-27 18:56:28,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:28,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949112375] [2024-06-27 18:56:28,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:28,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:28,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:30,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:30,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949112375] [2024-06-27 18:56:30,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949112375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:30,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:56:30,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259571076] [2024-06-27 18:56:30,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:30,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:56:30,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:30,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:56:30,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:56:30,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 47 [2024-06-27 18:56:30,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 188 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:30,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:30,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 47 [2024-06-27 18:56:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:31,782 INFO L124 PetriNetUnfolderBase]: 2769/4162 cut-off events. [2024-06-27 18:56:31,782 INFO L125 PetriNetUnfolderBase]: For 2308/2338 co-relation queries the response was YES. [2024-06-27 18:56:31,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10435 conditions, 4162 events. 2769/4162 cut-off events. For 2308/2338 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22495 event pairs, 709 based on Foata normal form. 15/4169 useless extension candidates. Maximal degree in co-relation 10420. Up to 3890 conditions per place. [2024-06-27 18:56:31,805 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 87 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2024-06-27 18:56:31,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 546 flow [2024-06-27 18:56:31,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:31,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:31,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-27 18:56:31,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-06-27 18:56:31,810 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 188 flow. Second operand 6 states and 180 transitions. [2024-06-27 18:56:31,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 546 flow [2024-06-27 18:56:31,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 111 transitions, 546 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-27 18:56:31,818 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 258 flow [2024-06-27 18:56:31,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-27 18:56:31,819 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2024-06-27 18:56:31,820 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 258 flow [2024-06-27 18:56:31,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:31,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:31,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:31,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:56:31,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:31,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:31,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1651719414, now seen corresponding path program 1 times [2024-06-27 18:56:31,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:31,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063894075] [2024-06-27 18:56:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:31,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:33,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063894075] [2024-06-27 18:56:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063894075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:33,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:33,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:56:33,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293911653] [2024-06-27 18:56:33,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:33,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:56:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:33,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:56:33,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:56:33,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:33,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 258 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:33,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:33,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:33,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:34,301 INFO L124 PetriNetUnfolderBase]: 3310/5149 cut-off events. [2024-06-27 18:56:34,301 INFO L125 PetriNetUnfolderBase]: For 4482/4482 co-relation queries the response was YES. [2024-06-27 18:56:34,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13605 conditions, 5149 events. 3310/5149 cut-off events. For 4482/4482 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29293 event pairs, 1324 based on Foata normal form. 2/5147 useless extension candidates. Maximal degree in co-relation 13585. Up to 4735 conditions per place. [2024-06-27 18:56:34,350 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 70 selfloop transitions, 13 changer transitions 0/90 dead transitions. [2024-06-27 18:56:34,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 542 flow [2024-06-27 18:56:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:56:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:56:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-27 18:56:34,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234042553191489 [2024-06-27 18:56:34,353 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 258 flow. Second operand 5 states and 123 transitions. [2024-06-27 18:56:34,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 542 flow [2024-06-27 18:56:34,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 90 transitions, 509 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 18:56:34,359 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 337 flow [2024-06-27 18:56:34,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-27 18:56:34,361 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2024-06-27 18:56:34,361 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 337 flow [2024-06-27 18:56:34,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:34,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:34,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:34,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:56:34,362 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:34,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash -305797729, now seen corresponding path program 1 times [2024-06-27 18:56:34,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:34,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625179258] [2024-06-27 18:56:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:34,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:35,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:35,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625179258] [2024-06-27 18:56:35,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625179258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:35,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:35,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:56:35,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548612532] [2024-06-27 18:56:35,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:56:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:35,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:56:35,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:56:35,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:35,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:35,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:35,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:35,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:36,799 INFO L124 PetriNetUnfolderBase]: 3305/5151 cut-off events. [2024-06-27 18:56:36,800 INFO L125 PetriNetUnfolderBase]: For 6141/6144 co-relation queries the response was YES. [2024-06-27 18:56:36,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14872 conditions, 5151 events. 3305/5151 cut-off events. For 6141/6144 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 29365 event pairs, 1337 based on Foata normal form. 4/5152 useless extension candidates. Maximal degree in co-relation 14849. Up to 4730 conditions per place. [2024-06-27 18:56:36,828 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 69 selfloop transitions, 13 changer transitions 0/89 dead transitions. [2024-06-27 18:56:36,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 89 transitions, 556 flow [2024-06-27 18:56:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:56:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:56:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:56:36,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:56:36,833 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 337 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:56:36,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 89 transitions, 556 flow [2024-06-27 18:56:36,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 89 transitions, 548 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:36,846 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 369 flow [2024-06-27 18:56:36,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-27 18:56:36,848 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 17 predicate places. [2024-06-27 18:56:36,848 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 369 flow [2024-06-27 18:56:36,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:36,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:36,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:36,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:56:36,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:36,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:36,852 INFO L85 PathProgramCache]: Analyzing trace with hash -921404043, now seen corresponding path program 1 times [2024-06-27 18:56:36,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:36,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002750614] [2024-06-27 18:56:36,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:36,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:39,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:39,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002750614] [2024-06-27 18:56:39,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002750614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:39,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:39,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:56:39,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161657864] [2024-06-27 18:56:39,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:39,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:56:39,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:56:39,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:56:39,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:39,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 369 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:39,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:39,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:39,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:40,709 INFO L124 PetriNetUnfolderBase]: 3336/4962 cut-off events. [2024-06-27 18:56:40,709 INFO L125 PetriNetUnfolderBase]: For 7002/7002 co-relation queries the response was YES. [2024-06-27 18:56:40,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15002 conditions, 4962 events. 3336/4962 cut-off events. For 7002/7002 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26671 event pairs, 1003 based on Foata normal form. 2/4959 useless extension candidates. Maximal degree in co-relation 14976. Up to 4633 conditions per place. [2024-06-27 18:56:40,749 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 96 selfloop transitions, 21 changer transitions 0/124 dead transitions. [2024-06-27 18:56:40,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 124 transitions, 802 flow [2024-06-27 18:56:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:40,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:56:40,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 18:56:40,751 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 369 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:56:40,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 124 transitions, 802 flow [2024-06-27 18:56:40,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 124 transitions, 783 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:40,758 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 501 flow [2024-06-27 18:56:40,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=501, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-27 18:56:40,759 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2024-06-27 18:56:40,759 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 501 flow [2024-06-27 18:56:40,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:40,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:40,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:40,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:56:40,760 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:40,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:40,760 INFO L85 PathProgramCache]: Analyzing trace with hash -890809833, now seen corresponding path program 2 times [2024-06-27 18:56:40,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:40,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498626718] [2024-06-27 18:56:40,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:40,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:42,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498626718] [2024-06-27 18:56:42,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498626718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:42,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:42,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:56:42,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047484458] [2024-06-27 18:56:42,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:42,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:56:42,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:56:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:56:42,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:42,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 501 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:42,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:42,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:42,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:44,237 INFO L124 PetriNetUnfolderBase]: 3331/4946 cut-off events. [2024-06-27 18:56:44,238 INFO L125 PetriNetUnfolderBase]: For 10708/10715 co-relation queries the response was YES. [2024-06-27 18:56:44,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16660 conditions, 4946 events. 3331/4946 cut-off events. For 10708/10715 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 26614 event pairs, 1017 based on Foata normal form. 8/4947 useless extension candidates. Maximal degree in co-relation 16630. Up to 4630 conditions per place. [2024-06-27 18:56:44,288 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 92 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-27 18:56:44,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 125 transitions, 911 flow [2024-06-27 18:56:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:56:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:56:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-27 18:56:44,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390070921985816 [2024-06-27 18:56:44,290 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 501 flow. Second operand 6 states and 152 transitions. [2024-06-27 18:56:44,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 125 transitions, 911 flow [2024-06-27 18:56:44,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 903 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:44,304 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 641 flow [2024-06-27 18:56:44,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=641, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-27 18:56:44,305 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 30 predicate places. [2024-06-27 18:56:44,305 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 641 flow [2024-06-27 18:56:44,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:44,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:44,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:44,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:56:44,306 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:44,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:44,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1825140632, now seen corresponding path program 1 times [2024-06-27 18:56:44,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:44,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241302958] [2024-06-27 18:56:44,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:44,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:47,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:47,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241302958] [2024-06-27 18:56:47,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241302958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:47,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:47,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:47,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770719971] [2024-06-27 18:56:47,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:47,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:47,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:47,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:47,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 641 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:47,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:47,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:47,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:48,802 INFO L124 PetriNetUnfolderBase]: 3615/5427 cut-off events. [2024-06-27 18:56:48,802 INFO L125 PetriNetUnfolderBase]: For 13781/13787 co-relation queries the response was YES. [2024-06-27 18:56:48,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19283 conditions, 5427 events. 3615/5427 cut-off events. For 13781/13787 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 30367 event pairs, 876 based on Foata normal form. 9/5434 useless extension candidates. Maximal degree in co-relation 19248. Up to 4887 conditions per place. [2024-06-27 18:56:48,830 INFO L140 encePairwiseOnDemand]: 32/47 looper letters, 143 selfloop transitions, 40 changer transitions 0/190 dead transitions. [2024-06-27 18:56:48,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 190 transitions, 1425 flow [2024-06-27 18:56:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:56:48,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:56:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-27 18:56:48,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673758865248227 [2024-06-27 18:56:48,833 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 641 flow. Second operand 9 states and 240 transitions. [2024-06-27 18:56:48,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 190 transitions, 1425 flow [2024-06-27 18:56:48,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 190 transitions, 1415 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-27 18:56:48,850 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 921 flow [2024-06-27 18:56:48,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-27 18:56:48,852 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 41 predicate places. [2024-06-27 18:56:48,852 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 921 flow [2024-06-27 18:56:48,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:48,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:48,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:48,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:56:48,853 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:48,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:48,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1071812682, now seen corresponding path program 2 times [2024-06-27 18:56:48,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:48,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025840977] [2024-06-27 18:56:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:48,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:51,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:51,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025840977] [2024-06-27 18:56:51,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025840977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:51,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:51,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:51,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530472488] [2024-06-27 18:56:51,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:51,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:51,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:51,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:51,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:51,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:51,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 921 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:51,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:51,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:51,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:53,358 INFO L124 PetriNetUnfolderBase]: 3731/5608 cut-off events. [2024-06-27 18:56:53,362 INFO L125 PetriNetUnfolderBase]: For 20441/20449 co-relation queries the response was YES. [2024-06-27 18:56:53,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22446 conditions, 5608 events. 3731/5608 cut-off events. For 20441/20449 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31400 event pairs, 806 based on Foata normal form. 11/5617 useless extension candidates. Maximal degree in co-relation 22405. Up to 4947 conditions per place. [2024-06-27 18:56:53,438 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 134 selfloop transitions, 47 changer transitions 0/188 dead transitions. [2024-06-27 18:56:53,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 188 transitions, 1619 flow [2024-06-27 18:56:53,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:56:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:56:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:56:53,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638297872340425 [2024-06-27 18:56:53,453 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 921 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:56:53,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 188 transitions, 1619 flow [2024-06-27 18:56:53,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 188 transitions, 1584 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 18:56:53,493 INFO L231 Difference]: Finished difference. Result has 99 places, 116 transitions, 1087 flow [2024-06-27 18:56:53,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=99, PETRI_TRANSITIONS=116} [2024-06-27 18:56:53,495 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 48 predicate places. [2024-06-27 18:56:53,508 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 116 transitions, 1087 flow [2024-06-27 18:56:53,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:53,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:53,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:53,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:56:53,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:53,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:53,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1060813288, now seen corresponding path program 3 times [2024-06-27 18:56:53,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:53,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017801465] [2024-06-27 18:56:53,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:53,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:56:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:56:56,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:56:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017801465] [2024-06-27 18:56:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017801465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:56:56,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:56:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:56:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438776467] [2024-06-27 18:56:56,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:56:56,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:56:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:56:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:56:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:56:56,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:56:56,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 116 transitions, 1087 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:56,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:56:56,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:56:56,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:56:58,102 INFO L124 PetriNetUnfolderBase]: 3762/5627 cut-off events. [2024-06-27 18:56:58,102 INFO L125 PetriNetUnfolderBase]: For 27928/27930 co-relation queries the response was YES. [2024-06-27 18:56:58,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24793 conditions, 5627 events. 3762/5627 cut-off events. For 27928/27930 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30795 event pairs, 918 based on Foata normal form. 2/5623 useless extension candidates. Maximal degree in co-relation 24749. Up to 4920 conditions per place. [2024-06-27 18:56:58,139 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 136 selfloop transitions, 47 changer transitions 0/190 dead transitions. [2024-06-27 18:56:58,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 190 transitions, 1872 flow [2024-06-27 18:56:58,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:56:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:56:58,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:56:58,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592705167173252 [2024-06-27 18:56:58,141 INFO L175 Difference]: Start difference. First operand has 99 places, 116 transitions, 1087 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:56:58,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 190 transitions, 1872 flow [2024-06-27 18:56:58,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 190 transitions, 1782 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 18:56:58,177 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1398 flow [2024-06-27 18:56:58,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2024-06-27 18:56:58,177 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 53 predicate places. [2024-06-27 18:56:58,177 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1398 flow [2024-06-27 18:56:58,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:56:58,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:56:58,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:56:58,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:56:58,178 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:56:58,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:56:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1242510276, now seen corresponding path program 1 times [2024-06-27 18:56:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:56:58,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868412855] [2024-06-27 18:56:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:56:58,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:56:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:00,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:00,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868412855] [2024-06-27 18:57:00,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868412855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:00,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:00,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:00,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225206735] [2024-06-27 18:57:00,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:00,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:00,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:00,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1398 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:00,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:00,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:00,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:01,768 INFO L124 PetriNetUnfolderBase]: 3793/5685 cut-off events. [2024-06-27 18:57:01,768 INFO L125 PetriNetUnfolderBase]: For 32435/32443 co-relation queries the response was YES. [2024-06-27 18:57:01,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26514 conditions, 5685 events. 3793/5685 cut-off events. For 32435/32443 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31294 event pairs, 902 based on Foata normal form. 10/5690 useless extension candidates. Maximal degree in co-relation 26466. Up to 5232 conditions per place. [2024-06-27 18:57:01,811 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 147 selfloop transitions, 29 changer transitions 0/183 dead transitions. [2024-06-27 18:57:01,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 183 transitions, 1956 flow [2024-06-27 18:57:01,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:01,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 18:57:01,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5567375886524822 [2024-06-27 18:57:01,813 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1398 flow. Second operand 6 states and 157 transitions. [2024-06-27 18:57:01,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 183 transitions, 1956 flow [2024-06-27 18:57:01,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 183 transitions, 1906 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-27 18:57:01,923 INFO L231 Difference]: Finished difference. Result has 108 places, 139 transitions, 1449 flow [2024-06-27 18:57:01,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1449, PETRI_PLACES=108, PETRI_TRANSITIONS=139} [2024-06-27 18:57:01,924 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 57 predicate places. [2024-06-27 18:57:01,924 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 139 transitions, 1449 flow [2024-06-27 18:57:01,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:01,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:01,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:01,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:57:01,925 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:01,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1845061768, now seen corresponding path program 2 times [2024-06-27 18:57:01,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:01,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494159703] [2024-06-27 18:57:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:01,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:03,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:03,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494159703] [2024-06-27 18:57:03,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494159703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:03,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:03,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:03,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660573919] [2024-06-27 18:57:03,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:03,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:03,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:03,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:03,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:03,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:03,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 139 transitions, 1449 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:03,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:03,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:03,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:05,221 INFO L124 PetriNetUnfolderBase]: 3788/5688 cut-off events. [2024-06-27 18:57:05,222 INFO L125 PetriNetUnfolderBase]: For 33085/33126 co-relation queries the response was YES. [2024-06-27 18:57:05,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26314 conditions, 5688 events. 3788/5688 cut-off events. For 33085/33126 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31450 event pairs, 921 based on Foata normal form. 34/5715 useless extension candidates. Maximal degree in co-relation 26264. Up to 5227 conditions per place. [2024-06-27 18:57:05,259 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 145 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-27 18:57:05,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 1951 flow [2024-06-27 18:57:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:05,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 18:57:05,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:57:05,261 INFO L175 Difference]: Start difference. First operand has 108 places, 139 transitions, 1449 flow. Second operand 6 states and 150 transitions. [2024-06-27 18:57:05,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 1951 flow [2024-06-27 18:57:05,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 181 transitions, 1910 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:05,290 INFO L231 Difference]: Finished difference. Result has 111 places, 141 transitions, 1503 flow [2024-06-27 18:57:05,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1411, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1503, PETRI_PLACES=111, PETRI_TRANSITIONS=141} [2024-06-27 18:57:05,291 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 60 predicate places. [2024-06-27 18:57:05,291 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 141 transitions, 1503 flow [2024-06-27 18:57:05,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:05,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:05,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:05,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:57:05,292 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:05,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1845299104, now seen corresponding path program 4 times [2024-06-27 18:57:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:05,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983318901] [2024-06-27 18:57:05,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:05,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:07,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:07,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:07,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983318901] [2024-06-27 18:57:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983318901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:07,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:07,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517757800] [2024-06-27 18:57:07,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:07,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:07,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:07,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 141 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:07,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:07,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:07,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:09,228 INFO L124 PetriNetUnfolderBase]: 3783/5629 cut-off events. [2024-06-27 18:57:09,228 INFO L125 PetriNetUnfolderBase]: For 34980/34988 co-relation queries the response was YES. [2024-06-27 18:57:09,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26424 conditions, 5629 events. 3783/5629 cut-off events. For 34980/34988 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30446 event pairs, 965 based on Foata normal form. 4/5615 useless extension candidates. Maximal degree in co-relation 26373. Up to 4934 conditions per place. [2024-06-27 18:57:09,269 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 133 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-27 18:57:09,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 195 transitions, 2115 flow [2024-06-27 18:57:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:57:09,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 18:57:09,272 INFO L175 Difference]: Start difference. First operand has 111 places, 141 transitions, 1503 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:57:09,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 195 transitions, 2115 flow [2024-06-27 18:57:09,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 195 transitions, 2072 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:09,310 INFO L231 Difference]: Finished difference. Result has 115 places, 144 transitions, 1618 flow [2024-06-27 18:57:09,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1618, PETRI_PLACES=115, PETRI_TRANSITIONS=144} [2024-06-27 18:57:09,310 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 64 predicate places. [2024-06-27 18:57:09,311 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 144 transitions, 1618 flow [2024-06-27 18:57:09,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:09,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:09,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:09,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:57:09,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:09,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:09,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1812734410, now seen corresponding path program 1 times [2024-06-27 18:57:09,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:09,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135010457] [2024-06-27 18:57:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:09,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:10,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:10,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135010457] [2024-06-27 18:57:10,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135010457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:10,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:10,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:57:10,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602171171] [2024-06-27 18:57:10,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:10,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:57:10,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:57:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:57:10,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:10,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 144 transitions, 1618 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:10,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:10,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:10,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:12,144 INFO L124 PetriNetUnfolderBase]: 3775/5892 cut-off events. [2024-06-27 18:57:12,145 INFO L125 PetriNetUnfolderBase]: For 40326/40334 co-relation queries the response was YES. [2024-06-27 18:57:12,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27318 conditions, 5892 events. 3775/5892 cut-off events. For 40326/40334 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 33953 event pairs, 1132 based on Foata normal form. 8/5897 useless extension candidates. Maximal degree in co-relation 27266. Up to 5340 conditions per place. [2024-06-27 18:57:12,182 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 156 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2024-06-27 18:57:12,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 179 transitions, 2078 flow [2024-06-27 18:57:12,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:57:12,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:57:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:57:12,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:57:12,184 INFO L175 Difference]: Start difference. First operand has 115 places, 144 transitions, 1618 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:57:12,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 179 transitions, 2078 flow [2024-06-27 18:57:12,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 179 transitions, 1987 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:12,216 INFO L231 Difference]: Finished difference. Result has 117 places, 147 transitions, 1603 flow [2024-06-27 18:57:12,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1603, PETRI_PLACES=117, PETRI_TRANSITIONS=147} [2024-06-27 18:57:12,217 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2024-06-27 18:57:12,217 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 147 transitions, 1603 flow [2024-06-27 18:57:12,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:12,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:12,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:12,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:57:12,218 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:12,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:12,218 INFO L85 PathProgramCache]: Analyzing trace with hash 133164401, now seen corresponding path program 1 times [2024-06-27 18:57:12,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:12,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879843567] [2024-06-27 18:57:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:12,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879843567] [2024-06-27 18:57:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879843567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:14,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:14,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601862525] [2024-06-27 18:57:14,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:14,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:14,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:14,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:14,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:14,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 147 transitions, 1603 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:14,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:14,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:14,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:16,279 INFO L124 PetriNetUnfolderBase]: 3759/5644 cut-off events. [2024-06-27 18:57:16,279 INFO L125 PetriNetUnfolderBase]: For 41163/41171 co-relation queries the response was YES. [2024-06-27 18:57:16,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27098 conditions, 5644 events. 3759/5644 cut-off events. For 41163/41171 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 31180 event pairs, 881 based on Foata normal form. 14/5656 useless extension candidates. Maximal degree in co-relation 27044. Up to 4991 conditions per place. [2024-06-27 18:57:16,319 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 147 selfloop transitions, 61 changer transitions 0/215 dead transitions. [2024-06-27 18:57:16,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 215 transitions, 2243 flow [2024-06-27 18:57:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:16,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:57:16,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 18:57:16,342 INFO L175 Difference]: Start difference. First operand has 117 places, 147 transitions, 1603 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:57:16,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 215 transitions, 2243 flow [2024-06-27 18:57:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 215 transitions, 2177 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:16,384 INFO L231 Difference]: Finished difference. Result has 121 places, 147 transitions, 1679 flow [2024-06-27 18:57:16,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1679, PETRI_PLACES=121, PETRI_TRANSITIONS=147} [2024-06-27 18:57:16,385 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 70 predicate places. [2024-06-27 18:57:16,386 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 147 transitions, 1679 flow [2024-06-27 18:57:16,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:16,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:16,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:16,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:57:16,386 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:16,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1474528569, now seen corresponding path program 2 times [2024-06-27 18:57:16,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:16,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580835187] [2024-06-27 18:57:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:16,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:19,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:19,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580835187] [2024-06-27 18:57:19,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580835187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:19,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:19,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:19,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979428119] [2024-06-27 18:57:19,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:19,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:19,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:19,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:19,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:19,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:19,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 147 transitions, 1679 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:19,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:19,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:19,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:20,934 INFO L124 PetriNetUnfolderBase]: 3790/5677 cut-off events. [2024-06-27 18:57:20,934 INFO L125 PetriNetUnfolderBase]: For 45254/45256 co-relation queries the response was YES. [2024-06-27 18:57:20,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27803 conditions, 5677 events. 3790/5677 cut-off events. For 45254/45256 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 31148 event pairs, 906 based on Foata normal form. 2/5673 useless extension candidates. Maximal degree in co-relation 27748. Up to 4936 conditions per place. [2024-06-27 18:57:20,977 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 151 selfloop transitions, 56 changer transitions 0/214 dead transitions. [2024-06-27 18:57:20,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 214 transitions, 2381 flow [2024-06-27 18:57:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:20,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:20,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:57:20,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 18:57:20,996 INFO L175 Difference]: Start difference. First operand has 121 places, 147 transitions, 1679 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:57:20,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 214 transitions, 2381 flow [2024-06-27 18:57:21,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 214 transitions, 2243 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:21,036 INFO L231 Difference]: Finished difference. Result has 122 places, 150 transitions, 1701 flow [2024-06-27 18:57:21,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1547, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1701, PETRI_PLACES=122, PETRI_TRANSITIONS=150} [2024-06-27 18:57:21,036 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 71 predicate places. [2024-06-27 18:57:21,037 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 150 transitions, 1701 flow [2024-06-27 18:57:21,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:21,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:21,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:21,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:57:21,037 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:21,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:21,038 INFO L85 PathProgramCache]: Analyzing trace with hash 136889051, now seen corresponding path program 3 times [2024-06-27 18:57:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:21,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111569715] [2024-06-27 18:57:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:23,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111569715] [2024-06-27 18:57:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111569715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:23,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177873843] [2024-06-27 18:57:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:23,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:23,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:23,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:23,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:23,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:23,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 150 transitions, 1701 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:23,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:23,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:23,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:25,304 INFO L124 PetriNetUnfolderBase]: 3857/5806 cut-off events. [2024-06-27 18:57:25,304 INFO L125 PetriNetUnfolderBase]: For 45221/45223 co-relation queries the response was YES. [2024-06-27 18:57:25,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28078 conditions, 5806 events. 3857/5806 cut-off events. For 45221/45223 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32233 event pairs, 908 based on Foata normal form. 2/5803 useless extension candidates. Maximal degree in co-relation 28022. Up to 5005 conditions per place. [2024-06-27 18:57:25,348 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 145 selfloop transitions, 59 changer transitions 0/211 dead transitions. [2024-06-27 18:57:25,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 211 transitions, 2471 flow [2024-06-27 18:57:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:57:25,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653495440729484 [2024-06-27 18:57:25,350 INFO L175 Difference]: Start difference. First operand has 122 places, 150 transitions, 1701 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:57:25,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 211 transitions, 2471 flow [2024-06-27 18:57:25,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 211 transitions, 2333 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:25,399 INFO L231 Difference]: Finished difference. Result has 123 places, 156 transitions, 1769 flow [2024-06-27 18:57:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1769, PETRI_PLACES=123, PETRI_TRANSITIONS=156} [2024-06-27 18:57:25,400 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 72 predicate places. [2024-06-27 18:57:25,400 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 156 transitions, 1769 flow [2024-06-27 18:57:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:25,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:57:25,401 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:25,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1369695247, now seen corresponding path program 4 times [2024-06-27 18:57:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515149408] [2024-06-27 18:57:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:27,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515149408] [2024-06-27 18:57:27,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515149408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:27,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:27,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:27,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318742160] [2024-06-27 18:57:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:27,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:27,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 156 transitions, 1769 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:27,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:27,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:27,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:29,815 INFO L124 PetriNetUnfolderBase]: 3852/5750 cut-off events. [2024-06-27 18:57:29,816 INFO L125 PetriNetUnfolderBase]: For 47978/47986 co-relation queries the response was YES. [2024-06-27 18:57:29,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28029 conditions, 5750 events. 3852/5750 cut-off events. For 47978/47986 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 31257 event pairs, 973 based on Foata normal form. 4/5736 useless extension candidates. Maximal degree in co-relation 27972. Up to 5000 conditions per place. [2024-06-27 18:57:29,857 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 147 selfloop transitions, 64 changer transitions 0/218 dead transitions. [2024-06-27 18:57:29,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 218 transitions, 2447 flow [2024-06-27 18:57:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:57:29,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:57:29,859 INFO L175 Difference]: Start difference. First operand has 123 places, 156 transitions, 1769 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:57:29,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 218 transitions, 2447 flow [2024-06-27 18:57:29,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 218 transitions, 2363 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 18:57:29,905 INFO L231 Difference]: Finished difference. Result has 128 places, 156 transitions, 1821 flow [2024-06-27 18:57:29,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1821, PETRI_PLACES=128, PETRI_TRANSITIONS=156} [2024-06-27 18:57:29,906 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 77 predicate places. [2024-06-27 18:57:29,906 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 156 transitions, 1821 flow [2024-06-27 18:57:29,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:29,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:29,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:29,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:57:29,906 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:29,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash -392640967, now seen corresponding path program 5 times [2024-06-27 18:57:29,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:29,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916597237] [2024-06-27 18:57:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:32,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:32,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916597237] [2024-06-27 18:57:32,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916597237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:32,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:32,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:32,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408834597] [2024-06-27 18:57:32,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:32,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:32,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:32,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:32,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 156 transitions, 1821 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:32,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:32,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:32,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:33,843 INFO L124 PetriNetUnfolderBase]: 3847/5787 cut-off events. [2024-06-27 18:57:33,844 INFO L125 PetriNetUnfolderBase]: For 52690/52723 co-relation queries the response was YES. [2024-06-27 18:57:33,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28221 conditions, 5787 events. 3847/5787 cut-off events. For 52690/52723 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 32123 event pairs, 962 based on Foata normal form. 15/5789 useless extension candidates. Maximal degree in co-relation 28163. Up to 4995 conditions per place. [2024-06-27 18:57:33,892 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 141 selfloop transitions, 58 changer transitions 0/206 dead transitions. [2024-06-27 18:57:33,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 206 transitions, 2388 flow [2024-06-27 18:57:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:33,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:57:33,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379939209726444 [2024-06-27 18:57:33,896 INFO L175 Difference]: Start difference. First operand has 128 places, 156 transitions, 1821 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:57:33,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 206 transitions, 2388 flow [2024-06-27 18:57:33,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 206 transitions, 2244 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:33,959 INFO L231 Difference]: Finished difference. Result has 129 places, 157 transitions, 1816 flow [2024-06-27 18:57:33,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1816, PETRI_PLACES=129, PETRI_TRANSITIONS=157} [2024-06-27 18:57:33,959 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 78 predicate places. [2024-06-27 18:57:33,959 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 157 transitions, 1816 flow [2024-06-27 18:57:33,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:33,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:33,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:33,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:57:33,960 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:33,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2106043107, now seen corresponding path program 1 times [2024-06-27 18:57:33,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:33,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124955495] [2024-06-27 18:57:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:33,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:36,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124955495] [2024-06-27 18:57:36,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124955495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:36,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:36,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:36,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111083380] [2024-06-27 18:57:36,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:36,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:36,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:36,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:36,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:36,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:36,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 157 transitions, 1816 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:36,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:36,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:36,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:38,422 INFO L124 PetriNetUnfolderBase]: 4432/6689 cut-off events. [2024-06-27 18:57:38,422 INFO L125 PetriNetUnfolderBase]: For 60938/60946 co-relation queries the response was YES. [2024-06-27 18:57:38,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32657 conditions, 6689 events. 4432/6689 cut-off events. For 60938/60946 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38409 event pairs, 570 based on Foata normal form. 14/6701 useless extension candidates. Maximal degree in co-relation 32598. Up to 5083 conditions per place. [2024-06-27 18:57:38,472 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 179 selfloop transitions, 64 changer transitions 0/250 dead transitions. [2024-06-27 18:57:38,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 250 transitions, 2732 flow [2024-06-27 18:57:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:57:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:57:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 18:57:38,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.574468085106383 [2024-06-27 18:57:38,474 INFO L175 Difference]: Start difference. First operand has 129 places, 157 transitions, 1816 flow. Second operand 9 states and 243 transitions. [2024-06-27 18:57:38,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 250 transitions, 2732 flow [2024-06-27 18:57:38,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 250 transitions, 2640 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 18:57:38,550 INFO L231 Difference]: Finished difference. Result has 135 places, 164 transitions, 1967 flow [2024-06-27 18:57:38,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1967, PETRI_PLACES=135, PETRI_TRANSITIONS=164} [2024-06-27 18:57:38,551 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 84 predicate places. [2024-06-27 18:57:38,551 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 164 transitions, 1967 flow [2024-06-27 18:57:38,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:38,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:38,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:57:38,552 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:38,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash -56051145, now seen corresponding path program 2 times [2024-06-27 18:57:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:38,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530325589] [2024-06-27 18:57:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:41,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530325589] [2024-06-27 18:57:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530325589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:41,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:41,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:41,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703404648] [2024-06-27 18:57:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:41,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:41,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:41,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:41,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:41,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:41,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 164 transitions, 1967 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:41,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:41,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:41,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:43,180 INFO L124 PetriNetUnfolderBase]: 4419/6670 cut-off events. [2024-06-27 18:57:43,180 INFO L125 PetriNetUnfolderBase]: For 68423/68431 co-relation queries the response was YES. [2024-06-27 18:57:43,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33785 conditions, 6670 events. 4419/6670 cut-off events. For 68423/68431 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38149 event pairs, 859 based on Foata normal form. 14/6682 useless extension candidates. Maximal degree in co-relation 33723. Up to 5869 conditions per place. [2024-06-27 18:57:43,224 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 175 selfloop transitions, 64 changer transitions 0/246 dead transitions. [2024-06-27 18:57:43,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 246 transitions, 2735 flow [2024-06-27 18:57:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:57:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:57:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:57:43,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-27 18:57:43,226 INFO L175 Difference]: Start difference. First operand has 135 places, 164 transitions, 1967 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:57:43,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 246 transitions, 2735 flow [2024-06-27 18:57:43,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 246 transitions, 2633 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:43,318 INFO L231 Difference]: Finished difference. Result has 139 places, 167 transitions, 2056 flow [2024-06-27 18:57:43,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1867, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2056, PETRI_PLACES=139, PETRI_TRANSITIONS=167} [2024-06-27 18:57:43,319 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 88 predicate places. [2024-06-27 18:57:43,319 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 167 transitions, 2056 flow [2024-06-27 18:57:43,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:43,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:43,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:43,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:57:43,319 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:43,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:43,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1534257417, now seen corresponding path program 3 times [2024-06-27 18:57:43,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:43,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499260343] [2024-06-27 18:57:43,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:43,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:46,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499260343] [2024-06-27 18:57:46,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499260343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:46,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:46,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348120153] [2024-06-27 18:57:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:46,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:46,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:46,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 167 transitions, 2056 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:46,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:46,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:46,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:48,059 INFO L124 PetriNetUnfolderBase]: 4469/6722 cut-off events. [2024-06-27 18:57:48,059 INFO L125 PetriNetUnfolderBase]: For 76022/76024 co-relation queries the response was YES. [2024-06-27 18:57:48,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34916 conditions, 6722 events. 4469/6722 cut-off events. For 76022/76024 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 38176 event pairs, 886 based on Foata normal form. 4/6720 useless extension candidates. Maximal degree in co-relation 34852. Up to 5875 conditions per place. [2024-06-27 18:57:48,114 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 160 selfloop transitions, 65 changer transitions 0/232 dead transitions. [2024-06-27 18:57:48,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 232 transitions, 2730 flow [2024-06-27 18:57:48,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:57:48,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 18:57:48,115 INFO L175 Difference]: Start difference. First operand has 139 places, 167 transitions, 2056 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:57:48,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 232 transitions, 2730 flow [2024-06-27 18:57:48,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 232 transitions, 2583 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 18:57:48,217 INFO L231 Difference]: Finished difference. Result has 140 places, 169 transitions, 2084 flow [2024-06-27 18:57:48,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2084, PETRI_PLACES=140, PETRI_TRANSITIONS=169} [2024-06-27 18:57:48,217 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 89 predicate places. [2024-06-27 18:57:48,217 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 169 transitions, 2084 flow [2024-06-27 18:57:48,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:48,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:48,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:48,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:57:48,218 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:48,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:48,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1534072719, now seen corresponding path program 1 times [2024-06-27 18:57:48,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:48,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29221441] [2024-06-27 18:57:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:48,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:50,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:50,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:50,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29221441] [2024-06-27 18:57:50,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29221441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:50,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:50,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:50,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900822800] [2024-06-27 18:57:50,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:50,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:50,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:50,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:50,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:50,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:50,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 169 transitions, 2084 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:50,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:50,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:50,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:52,536 INFO L124 PetriNetUnfolderBase]: 4519/6811 cut-off events. [2024-06-27 18:57:52,537 INFO L125 PetriNetUnfolderBase]: For 81769/81777 co-relation queries the response was YES. [2024-06-27 18:57:52,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35553 conditions, 6811 events. 4519/6811 cut-off events. For 81769/81777 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 39051 event pairs, 849 based on Foata normal form. 12/6818 useless extension candidates. Maximal degree in co-relation 35488. Up to 6262 conditions per place. [2024-06-27 18:57:52,588 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 185 selfloop transitions, 33 changer transitions 0/225 dead transitions. [2024-06-27 18:57:52,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 225 transitions, 2712 flow [2024-06-27 18:57:52,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:57:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:57:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:57:52,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 18:57:52,590 INFO L175 Difference]: Start difference. First operand has 140 places, 169 transitions, 2084 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:57:52,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 225 transitions, 2712 flow [2024-06-27 18:57:52,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 225 transitions, 2559 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 18:57:52,704 INFO L231 Difference]: Finished difference. Result has 141 places, 171 transitions, 2032 flow [2024-06-27 18:57:52,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1931, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2032, PETRI_PLACES=141, PETRI_TRANSITIONS=171} [2024-06-27 18:57:52,705 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 90 predicate places. [2024-06-27 18:57:52,705 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 171 transitions, 2032 flow [2024-06-27 18:57:52,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:52,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:52,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:52,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:57:52,706 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:52,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:52,706 INFO L85 PathProgramCache]: Analyzing trace with hash 489117503, now seen corresponding path program 4 times [2024-06-27 18:57:52,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:52,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569526685] [2024-06-27 18:57:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:52,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:55,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:55,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569526685] [2024-06-27 18:57:55,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569526685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:55,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:55,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:57:55,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022677500] [2024-06-27 18:57:55,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:55,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:57:55,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:57:55,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:57:55,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:55,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 171 transitions, 2032 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:55,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:55,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:55,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:57:57,444 INFO L124 PetriNetUnfolderBase]: 4511/6739 cut-off events. [2024-06-27 18:57:57,444 INFO L125 PetriNetUnfolderBase]: For 85691/85699 co-relation queries the response was YES. [2024-06-27 18:57:57,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35274 conditions, 6739 events. 4511/6739 cut-off events. For 85691/85699 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 37830 event pairs, 952 based on Foata normal form. 6/6725 useless extension candidates. Maximal degree in co-relation 35208. Up to 5937 conditions per place. [2024-06-27 18:57:57,495 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 160 selfloop transitions, 67 changer transitions 0/234 dead transitions. [2024-06-27 18:57:57,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 234 transitions, 2716 flow [2024-06-27 18:57:57,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:57:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:57:57,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 18:57:57,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372340425531915 [2024-06-27 18:57:57,497 INFO L175 Difference]: Start difference. First operand has 141 places, 171 transitions, 2032 flow. Second operand 8 states and 202 transitions. [2024-06-27 18:57:57,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 234 transitions, 2716 flow [2024-06-27 18:57:57,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 234 transitions, 2637 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 18:57:57,614 INFO L231 Difference]: Finished difference. Result has 144 places, 173 transitions, 2138 flow [2024-06-27 18:57:57,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2138, PETRI_PLACES=144, PETRI_TRANSITIONS=173} [2024-06-27 18:57:57,615 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 93 predicate places. [2024-06-27 18:57:57,615 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 173 transitions, 2138 flow [2024-06-27 18:57:57,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:57,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:57:57,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:57:57,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:57:57,615 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:57:57,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:57:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1461092839, now seen corresponding path program 2 times [2024-06-27 18:57:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:57:57,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992493825] [2024-06-27 18:57:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:57:57,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:57:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:57:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:57:59,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:57:59,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992493825] [2024-06-27 18:57:59,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992493825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:57:59,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:57:59,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:57:59,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868748542] [2024-06-27 18:57:59,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:57:59,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:57:59,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:57:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:57:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:57:59,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:57:59,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 173 transitions, 2138 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:57:59,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:57:59,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:57:59,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:01,629 INFO L124 PetriNetUnfolderBase]: 4561/6887 cut-off events. [2024-06-27 18:58:01,629 INFO L125 PetriNetUnfolderBase]: For 94191/94232 co-relation queries the response was YES. [2024-06-27 18:58:01,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36512 conditions, 6887 events. 4561/6887 cut-off events. For 94191/94232 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39635 event pairs, 886 based on Foata normal form. 36/6916 useless extension candidates. Maximal degree in co-relation 36445. Up to 6324 conditions per place. [2024-06-27 18:58:01,690 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 189 selfloop transitions, 31 changer transitions 0/227 dead transitions. [2024-06-27 18:58:01,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 227 transitions, 2776 flow [2024-06-27 18:58:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 18:58:01,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 18:58:01,691 INFO L175 Difference]: Start difference. First operand has 144 places, 173 transitions, 2138 flow. Second operand 7 states and 175 transitions. [2024-06-27 18:58:01,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 227 transitions, 2776 flow [2024-06-27 18:58:01,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 227 transitions, 2613 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:01,850 INFO L231 Difference]: Finished difference. Result has 145 places, 175 transitions, 2078 flow [2024-06-27 18:58:01,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2078, PETRI_PLACES=145, PETRI_TRANSITIONS=175} [2024-06-27 18:58:01,850 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 94 predicate places. [2024-06-27 18:58:01,851 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 175 transitions, 2078 flow [2024-06-27 18:58:01,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:01,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:01,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:01,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:58:01,851 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:01,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 725774231, now seen corresponding path program 3 times [2024-06-27 18:58:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:01,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666226014] [2024-06-27 18:58:01,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:03,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:03,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666226014] [2024-06-27 18:58:03,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666226014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:03,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:03,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:58:03,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541392265] [2024-06-27 18:58:03,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:03,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:58:03,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:03,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:58:03,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:58:03,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:03,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 175 transitions, 2078 flow. Second operand has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:03,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:03,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:03,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:05,618 INFO L124 PetriNetUnfolderBase]: 4553/6875 cut-off events. [2024-06-27 18:58:05,618 INFO L125 PetriNetUnfolderBase]: For 95305/95346 co-relation queries the response was YES. [2024-06-27 18:58:05,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36187 conditions, 6875 events. 4553/6875 cut-off events. For 95305/95346 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 39573 event pairs, 782 based on Foata normal form. 36/6904 useless extension candidates. Maximal degree in co-relation 36119. Up to 6162 conditions per place. [2024-06-27 18:58:05,667 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 188 selfloop transitions, 37 changer transitions 0/232 dead transitions. [2024-06-27 18:58:05,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 232 transitions, 2768 flow [2024-06-27 18:58:05,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:58:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:58:05,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 18:58:05,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5349544072948328 [2024-06-27 18:58:05,669 INFO L175 Difference]: Start difference. First operand has 145 places, 175 transitions, 2078 flow. Second operand 7 states and 176 transitions. [2024-06-27 18:58:05,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 232 transitions, 2768 flow [2024-06-27 18:58:05,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 232 transitions, 2687 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:58:05,790 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 2167 flow [2024-06-27 18:58:05,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2167, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2024-06-27 18:58:05,791 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 97 predicate places. [2024-06-27 18:58:05,791 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 2167 flow [2024-06-27 18:58:05,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.625) internal successors, (101), 8 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:05,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:05,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:05,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:58:05,792 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:05,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:05,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1955853326, now seen corresponding path program 1 times [2024-06-27 18:58:05,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:05,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085807997] [2024-06-27 18:58:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:05,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:07,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:07,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085807997] [2024-06-27 18:58:07,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085807997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:07,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:07,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:58:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055553580] [2024-06-27 18:58:07,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:07,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:58:07,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:58:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:58:07,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:58:07,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 179 transitions, 2167 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:07,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:07,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:58:07,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:08,642 INFO L124 PetriNetUnfolderBase]: 4256/6818 cut-off events. [2024-06-27 18:58:08,642 INFO L125 PetriNetUnfolderBase]: For 97545/97583 co-relation queries the response was YES. [2024-06-27 18:58:08,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35072 conditions, 6818 events. 4256/6818 cut-off events. For 97545/97583 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 42156 event pairs, 1191 based on Foata normal form. 38/6846 useless extension candidates. Maximal degree in co-relation 35002. Up to 6074 conditions per place. [2024-06-27 18:58:08,700 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 170 selfloop transitions, 13 changer transitions 0/202 dead transitions. [2024-06-27 18:58:08,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 202 transitions, 2615 flow [2024-06-27 18:58:08,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:58:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:58:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-27 18:58:08,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5148936170212766 [2024-06-27 18:58:08,702 INFO L175 Difference]: Start difference. First operand has 148 places, 179 transitions, 2167 flow. Second operand 5 states and 121 transitions. [2024-06-27 18:58:08,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 202 transitions, 2615 flow [2024-06-27 18:58:08,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 202 transitions, 2539 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 18:58:08,872 INFO L231 Difference]: Finished difference. Result has 150 places, 183 transitions, 2164 flow [2024-06-27 18:58:08,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2164, PETRI_PLACES=150, PETRI_TRANSITIONS=183} [2024-06-27 18:58:08,873 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 99 predicate places. [2024-06-27 18:58:08,873 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 183 transitions, 2164 flow [2024-06-27 18:58:08,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:08,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:08,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:08,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:58:08,874 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:08,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:08,874 INFO L85 PathProgramCache]: Analyzing trace with hash 315037724, now seen corresponding path program 1 times [2024-06-27 18:58:08,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:08,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996390186] [2024-06-27 18:58:08,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:08,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:11,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:11,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996390186] [2024-06-27 18:58:11,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996390186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:11,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:11,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:11,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341794681] [2024-06-27 18:58:11,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:11,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:11,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:11,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:11,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 183 transitions, 2164 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:11,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:11,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:11,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:13,605 INFO L124 PetriNetUnfolderBase]: 4771/7216 cut-off events. [2024-06-27 18:58:13,606 INFO L125 PetriNetUnfolderBase]: For 109210/109218 co-relation queries the response was YES. [2024-06-27 18:58:13,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39220 conditions, 7216 events. 4771/7216 cut-off events. For 109210/109218 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 41681 event pairs, 577 based on Foata normal form. 26/7240 useless extension candidates. Maximal degree in co-relation 39148. Up to 5365 conditions per place. [2024-06-27 18:58:13,666 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 197 selfloop transitions, 68 changer transitions 0/272 dead transitions. [2024-06-27 18:58:13,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 272 transitions, 3120 flow [2024-06-27 18:58:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 18:58:13,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768321513002365 [2024-06-27 18:58:13,668 INFO L175 Difference]: Start difference. First operand has 150 places, 183 transitions, 2164 flow. Second operand 9 states and 244 transitions. [2024-06-27 18:58:13,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 272 transitions, 3120 flow [2024-06-27 18:58:13,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 272 transitions, 3075 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:58:13,827 INFO L231 Difference]: Finished difference. Result has 156 places, 185 transitions, 2295 flow [2024-06-27 18:58:13,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2295, PETRI_PLACES=156, PETRI_TRANSITIONS=185} [2024-06-27 18:58:13,832 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 105 predicate places. [2024-06-27 18:58:13,832 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 185 transitions, 2295 flow [2024-06-27 18:58:13,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:13,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:13,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:13,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:58:13,833 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:13,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:13,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1737435496, now seen corresponding path program 2 times [2024-06-27 18:58:13,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:13,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039949183] [2024-06-27 18:58:13,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:13,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:16,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:16,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039949183] [2024-06-27 18:58:16,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039949183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:16,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:16,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:16,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418380722] [2024-06-27 18:58:16,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:16,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:16,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:16,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:16,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:16,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:16,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 185 transitions, 2295 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:16,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:16,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:16,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:18,734 INFO L124 PetriNetUnfolderBase]: 4725/7146 cut-off events. [2024-06-27 18:58:18,734 INFO L125 PetriNetUnfolderBase]: For 109376/109384 co-relation queries the response was YES. [2024-06-27 18:58:18,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39239 conditions, 7146 events. 4725/7146 cut-off events. For 109376/109384 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 41174 event pairs, 869 based on Foata normal form. 32/7176 useless extension candidates. Maximal degree in co-relation 39166. Up to 6005 conditions per place. [2024-06-27 18:58:18,796 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 198 selfloop transitions, 63 changer transitions 0/268 dead transitions. [2024-06-27 18:58:18,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 268 transitions, 3112 flow [2024-06-27 18:58:18,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:58:18,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626477541371159 [2024-06-27 18:58:18,797 INFO L175 Difference]: Start difference. First operand has 156 places, 185 transitions, 2295 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:58:18,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 268 transitions, 3112 flow [2024-06-27 18:58:18,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 268 transitions, 2990 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:18,960 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2336 flow [2024-06-27 18:58:18,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2336, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-27 18:58:18,961 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 108 predicate places. [2024-06-27 18:58:18,961 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2336 flow [2024-06-27 18:58:18,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:18,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:18,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:58:18,961 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash -317189672, now seen corresponding path program 3 times [2024-06-27 18:58:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:18,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104937546] [2024-06-27 18:58:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:18,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:22,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:22,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104937546] [2024-06-27 18:58:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104937546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:22,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:22,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:22,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760169747] [2024-06-27 18:58:22,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:22,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:22,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:22,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:22,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:22,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:22,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2336 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:22,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:22,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:22,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:24,527 INFO L124 PetriNetUnfolderBase]: 4901/7412 cut-off events. [2024-06-27 18:58:24,527 INFO L125 PetriNetUnfolderBase]: For 115558/115560 co-relation queries the response was YES. [2024-06-27 18:58:24,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40724 conditions, 7412 events. 4901/7412 cut-off events. For 115558/115560 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 42947 event pairs, 930 based on Foata normal form. 16/7422 useless extension candidates. Maximal degree in co-relation 40650. Up to 6351 conditions per place. [2024-06-27 18:58:24,592 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 193 selfloop transitions, 64 changer transitions 0/264 dead transitions. [2024-06-27 18:58:24,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 264 transitions, 3130 flow [2024-06-27 18:58:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:24,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:58:24,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 18:58:24,594 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2336 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:58:24,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 264 transitions, 3130 flow [2024-06-27 18:58:24,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 264 transitions, 3008 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:24,785 INFO L231 Difference]: Finished difference. Result has 161 places, 187 transitions, 2377 flow [2024-06-27 18:58:24,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2377, PETRI_PLACES=161, PETRI_TRANSITIONS=187} [2024-06-27 18:58:24,785 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 110 predicate places. [2024-06-27 18:58:24,785 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 187 transitions, 2377 flow [2024-06-27 18:58:24,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:24,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:24,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:24,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:58:24,786 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:24,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:24,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1599055216, now seen corresponding path program 4 times [2024-06-27 18:58:24,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:24,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565197577] [2024-06-27 18:58:24,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:24,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:24,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:27,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565197577] [2024-06-27 18:58:27,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565197577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:27,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:27,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526015644] [2024-06-27 18:58:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:27,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:27,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:27,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:27,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:27,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 187 transitions, 2377 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:27,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:27,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:27,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:30,277 INFO L124 PetriNetUnfolderBase]: 5027/7610 cut-off events. [2024-06-27 18:58:30,277 INFO L125 PetriNetUnfolderBase]: For 123395/123397 co-relation queries the response was YES. [2024-06-27 18:58:30,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42061 conditions, 7610 events. 5027/7610 cut-off events. For 123395/123397 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 44397 event pairs, 918 based on Foata normal form. 12/7616 useless extension candidates. Maximal degree in co-relation 41986. Up to 6329 conditions per place. [2024-06-27 18:58:30,350 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 205 selfloop transitions, 67 changer transitions 0/279 dead transitions. [2024-06-27 18:58:30,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 279 transitions, 3253 flow [2024-06-27 18:58:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:58:30,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:58:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-27 18:58:30,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5553191489361702 [2024-06-27 18:58:30,351 INFO L175 Difference]: Start difference. First operand has 161 places, 187 transitions, 2377 flow. Second operand 10 states and 261 transitions. [2024-06-27 18:58:30,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 279 transitions, 3253 flow [2024-06-27 18:58:30,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 279 transitions, 3114 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:30,650 INFO L231 Difference]: Finished difference. Result has 164 places, 188 transitions, 2408 flow [2024-06-27 18:58:30,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2238, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2408, PETRI_PLACES=164, PETRI_TRANSITIONS=188} [2024-06-27 18:58:30,651 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 18:58:30,651 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 188 transitions, 2408 flow [2024-06-27 18:58:30,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:30,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:30,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:30,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:58:30,658 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:30,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:30,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1593544966, now seen corresponding path program 5 times [2024-06-27 18:58:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:30,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709765227] [2024-06-27 18:58:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:30,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:33,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:33,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709765227] [2024-06-27 18:58:33,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709765227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:33,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:33,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:33,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466661523] [2024-06-27 18:58:33,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:33,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:33,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:33,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:33,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:33,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 188 transitions, 2408 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:33,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:33,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:33,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:35,269 INFO L124 PetriNetUnfolderBase]: 5203/7918 cut-off events. [2024-06-27 18:58:35,269 INFO L125 PetriNetUnfolderBase]: For 133735/133737 co-relation queries the response was YES. [2024-06-27 18:58:35,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43688 conditions, 7918 events. 5203/7918 cut-off events. For 133735/133737 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 47098 event pairs, 988 based on Foata normal form. 16/7929 useless extension candidates. Maximal degree in co-relation 43612. Up to 6821 conditions per place. [2024-06-27 18:58:35,347 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 187 selfloop transitions, 61 changer transitions 0/255 dead transitions. [2024-06-27 18:58:35,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 255 transitions, 3152 flow [2024-06-27 18:58:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:58:35,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 18:58:35,349 INFO L175 Difference]: Start difference. First operand has 164 places, 188 transitions, 2408 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:58:35,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 255 transitions, 3152 flow [2024-06-27 18:58:35,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 255 transitions, 3002 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 18:58:35,562 INFO L231 Difference]: Finished difference. Result has 164 places, 189 transitions, 2419 flow [2024-06-27 18:58:35,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2419, PETRI_PLACES=164, PETRI_TRANSITIONS=189} [2024-06-27 18:58:35,563 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 113 predicate places. [2024-06-27 18:58:35,563 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 189 transitions, 2419 flow [2024-06-27 18:58:35,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:35,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:35,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:58:35,564 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:35,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1593329764, now seen corresponding path program 1 times [2024-06-27 18:58:35,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:35,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108210008] [2024-06-27 18:58:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:38,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:38,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108210008] [2024-06-27 18:58:38,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108210008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:38,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:38,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019014401] [2024-06-27 18:58:38,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:38,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:38,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:38,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:38,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:38,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 189 transitions, 2419 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:38,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:38,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:38,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:40,391 INFO L124 PetriNetUnfolderBase]: 5533/8480 cut-off events. [2024-06-27 18:58:40,391 INFO L125 PetriNetUnfolderBase]: For 154339/154341 co-relation queries the response was YES. [2024-06-27 18:58:40,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47171 conditions, 8480 events. 5533/8480 cut-off events. For 154339/154341 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 51470 event pairs, 1024 based on Foata normal form. 12/8487 useless extension candidates. Maximal degree in co-relation 47094. Up to 6359 conditions per place. [2024-06-27 18:58:40,468 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 189 selfloop transitions, 66 changer transitions 0/262 dead transitions. [2024-06-27 18:58:40,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 262 transitions, 3349 flow [2024-06-27 18:58:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:58:40,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5664893617021277 [2024-06-27 18:58:40,470 INFO L175 Difference]: Start difference. First operand has 164 places, 189 transitions, 2419 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:58:40,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 262 transitions, 3349 flow [2024-06-27 18:58:40,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 262 transitions, 3212 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 18:58:40,727 INFO L231 Difference]: Finished difference. Result has 166 places, 191 transitions, 2486 flow [2024-06-27 18:58:40,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2486, PETRI_PLACES=166, PETRI_TRANSITIONS=191} [2024-06-27 18:58:40,727 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 115 predicate places. [2024-06-27 18:58:40,728 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 191 transitions, 2486 flow [2024-06-27 18:58:40,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:40,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:40,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:40,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:58:40,728 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:40,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:40,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2017220742, now seen corresponding path program 6 times [2024-06-27 18:58:40,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:40,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766851264] [2024-06-27 18:58:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:40,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:43,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:43,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766851264] [2024-06-27 18:58:43,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766851264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:43,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:43,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:43,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704002892] [2024-06-27 18:58:43,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:43,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:43,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:43,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:43,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 191 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:43,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:43,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:43,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:46,157 INFO L124 PetriNetUnfolderBase]: 5505/8399 cut-off events. [2024-06-27 18:58:46,157 INFO L125 PetriNetUnfolderBase]: For 152350/152358 co-relation queries the response was YES. [2024-06-27 18:58:46,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46381 conditions, 8399 events. 5505/8399 cut-off events. For 152350/152358 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 50423 event pairs, 1139 based on Foata normal form. 18/8399 useless extension candidates. Maximal degree in co-relation 46303. Up to 7291 conditions per place. [2024-06-27 18:58:46,239 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 193 selfloop transitions, 66 changer transitions 0/266 dead transitions. [2024-06-27 18:58:46,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 266 transitions, 3260 flow [2024-06-27 18:58:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:58:46,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:58:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:58:46,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541371158392435 [2024-06-27 18:58:46,241 INFO L175 Difference]: Start difference. First operand has 166 places, 191 transitions, 2486 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:58:46,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 266 transitions, 3260 flow [2024-06-27 18:58:46,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 266 transitions, 3154 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 18:58:46,649 INFO L231 Difference]: Finished difference. Result has 171 places, 191 transitions, 2519 flow [2024-06-27 18:58:46,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2519, PETRI_PLACES=171, PETRI_TRANSITIONS=191} [2024-06-27 18:58:46,649 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 120 predicate places. [2024-06-27 18:58:46,650 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 191 transitions, 2519 flow [2024-06-27 18:58:46,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:46,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:46,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:46,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:58:46,650 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:46,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:46,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1567305618, now seen corresponding path program 7 times [2024-06-27 18:58:46,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:46,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523321267] [2024-06-27 18:58:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:46,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:49,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:49,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523321267] [2024-06-27 18:58:49,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523321267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:49,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:49,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:58:49,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973265388] [2024-06-27 18:58:49,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:49,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:58:49,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:58:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:58:49,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:49,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 191 transitions, 2519 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:49,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:49,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:49,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:52,211 INFO L124 PetriNetUnfolderBase]: 5631/8585 cut-off events. [2024-06-27 18:58:52,211 INFO L125 PetriNetUnfolderBase]: For 152262/152270 co-relation queries the response was YES. [2024-06-27 18:58:52,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47561 conditions, 8585 events. 5631/8585 cut-off events. For 152262/152270 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 51799 event pairs, 1113 based on Foata normal form. 14/8581 useless extension candidates. Maximal degree in co-relation 47481. Up to 7269 conditions per place. [2024-06-27 18:58:52,285 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 205 selfloop transitions, 69 changer transitions 0/281 dead transitions. [2024-06-27 18:58:52,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 281 transitions, 3407 flow [2024-06-27 18:58:52,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:58:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:58:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-27 18:58:52,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446808510638298 [2024-06-27 18:58:52,286 INFO L175 Difference]: Start difference. First operand has 171 places, 191 transitions, 2519 flow. Second operand 10 states and 256 transitions. [2024-06-27 18:58:52,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 281 transitions, 3407 flow [2024-06-27 18:58:52,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 281 transitions, 3268 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 18:58:52,528 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 2560 flow [2024-06-27 18:58:52,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2560, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2024-06-27 18:58:52,528 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 123 predicate places. [2024-06-27 18:58:52,529 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 2560 flow [2024-06-27 18:58:52,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:52,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:52,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:52,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:58:52,529 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:52,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:52,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1950975506, now seen corresponding path program 8 times [2024-06-27 18:58:52,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:52,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123773083] [2024-06-27 18:58:52,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:52,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:58:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:58:55,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:58:55,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123773083] [2024-06-27 18:58:55,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123773083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:58:55,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:58:55,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:58:55,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381888436] [2024-06-27 18:58:55,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:58:55,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:58:55,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:58:55,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:58:55,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:58:55,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:58:55,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 2560 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:55,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:58:55,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:58:55,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:58:57,536 INFO L124 PetriNetUnfolderBase]: 5749/8827 cut-off events. [2024-06-27 18:58:57,536 INFO L125 PetriNetUnfolderBase]: For 164519/164552 co-relation queries the response was YES. [2024-06-27 18:58:57,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48788 conditions, 8827 events. 5749/8827 cut-off events. For 164519/164552 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 54233 event pairs, 1174 based on Foata normal form. 29/8843 useless extension candidates. Maximal degree in co-relation 48707. Up to 7675 conditions per place. [2024-06-27 18:58:57,606 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 191 selfloop transitions, 59 changer transitions 0/257 dead transitions. [2024-06-27 18:58:57,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 257 transitions, 3316 flow [2024-06-27 18:58:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:58:57,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:58:57,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:58:57,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:58:57,612 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 2560 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:58:57,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 257 transitions, 3316 flow [2024-06-27 18:58:57,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 257 transitions, 3156 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 18:58:57,851 INFO L231 Difference]: Finished difference. Result has 174 places, 193 transitions, 2563 flow [2024-06-27 18:58:57,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2563, PETRI_PLACES=174, PETRI_TRANSITIONS=193} [2024-06-27 18:58:57,852 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 123 predicate places. [2024-06-27 18:58:57,852 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 193 transitions, 2563 flow [2024-06-27 18:58:57,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:58:57,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:58:57,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:58:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:58:57,852 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:58:57,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:58:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1014969854, now seen corresponding path program 2 times [2024-06-27 18:58:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:58:57,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999459294] [2024-06-27 18:58:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:58:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:58:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:00,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:00,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:00,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999459294] [2024-06-27 18:59:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999459294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:00,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:00,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092472338] [2024-06-27 18:59:00,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:00,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:00,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 193 transitions, 2563 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:00,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:00,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:00,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:02,669 INFO L124 PetriNetUnfolderBase]: 5875/9045 cut-off events. [2024-06-27 18:59:02,669 INFO L125 PetriNetUnfolderBase]: For 169689/169722 co-relation queries the response was YES. [2024-06-27 18:59:02,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49725 conditions, 9045 events. 5875/9045 cut-off events. For 169689/169722 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 55857 event pairs, 1174 based on Foata normal form. 25/9057 useless extension candidates. Maximal degree in co-relation 49643. Up to 7653 conditions per place. [2024-06-27 18:59:02,744 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 193 selfloop transitions, 61 changer transitions 0/261 dead transitions. [2024-06-27 18:59:02,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 261 transitions, 3341 flow [2024-06-27 18:59:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:02,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:59:02,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 18:59:02,746 INFO L175 Difference]: Start difference. First operand has 174 places, 193 transitions, 2563 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:59:02,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 261 transitions, 3341 flow [2024-06-27 18:59:02,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 261 transitions, 3202 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:02,991 INFO L231 Difference]: Finished difference. Result has 176 places, 194 transitions, 2592 flow [2024-06-27 18:59:02,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2592, PETRI_PLACES=176, PETRI_TRANSITIONS=194} [2024-06-27 18:59:02,992 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-27 18:59:02,992 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 194 transitions, 2592 flow [2024-06-27 18:59:02,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:02,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:02,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:02,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:59:02,993 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:02,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:02,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1024166624, now seen corresponding path program 3 times [2024-06-27 18:59:02,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:02,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204779861] [2024-06-27 18:59:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:02,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:05,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:05,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204779861] [2024-06-27 18:59:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204779861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:05,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123290008] [2024-06-27 18:59:05,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:05,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:05,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:05,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 194 transitions, 2592 flow. Second operand has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:05,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:05,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:05,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:07,922 INFO L124 PetriNetUnfolderBase]: 5855/9005 cut-off events. [2024-06-27 18:59:07,922 INFO L125 PetriNetUnfolderBase]: For 160252/160285 co-relation queries the response was YES. [2024-06-27 18:59:07,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48666 conditions, 9005 events. 5855/9005 cut-off events. For 160252/160285 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 55332 event pairs, 1001 based on Foata normal form. 25/9017 useless extension candidates. Maximal degree in co-relation 48583. Up to 6171 conditions per place. [2024-06-27 18:59:08,006 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 183 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-27 18:59:08,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 261 transitions, 3262 flow [2024-06-27 18:59:08,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:59:08,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478723404255319 [2024-06-27 18:59:08,008 INFO L175 Difference]: Start difference. First operand has 176 places, 194 transitions, 2592 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:59:08,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 261 transitions, 3262 flow [2024-06-27 18:59:08,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 261 transitions, 3112 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:08,328 INFO L231 Difference]: Finished difference. Result has 177 places, 193 transitions, 2516 flow [2024-06-27 18:59:08,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2516, PETRI_PLACES=177, PETRI_TRANSITIONS=193} [2024-06-27 18:59:08,329 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 126 predicate places. [2024-06-27 18:59:08,329 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 193 transitions, 2516 flow [2024-06-27 18:59:08,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.555555555555555) internal successors, (113), 9 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:08,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:08,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:08,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:59:08,329 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:08,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash 268100016, now seen corresponding path program 1 times [2024-06-27 18:59:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261791782] [2024-06-27 18:59:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:09,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:09,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261791782] [2024-06-27 18:59:09,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261791782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:09,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:09,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:09,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707669951] [2024-06-27 18:59:09,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:09,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:09,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:09,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:09,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:09,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 193 transitions, 2516 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:09,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:09,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:09,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:11,641 INFO L124 PetriNetUnfolderBase]: 5873/9337 cut-off events. [2024-06-27 18:59:11,641 INFO L125 PetriNetUnfolderBase]: For 152458/152460 co-relation queries the response was YES. [2024-06-27 18:59:11,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49042 conditions, 9337 events. 5873/9337 cut-off events. For 152458/152460 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60504 event pairs, 1598 based on Foata normal form. 1/9334 useless extension candidates. Maximal degree in co-relation 48958. Up to 8521 conditions per place. [2024-06-27 18:59:11,730 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 199 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-27 18:59:11,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 234 transitions, 3362 flow [2024-06-27 18:59:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:11,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-27 18:59:11,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070921985815603 [2024-06-27 18:59:11,731 INFO L175 Difference]: Start difference. First operand has 177 places, 193 transitions, 2516 flow. Second operand 6 states and 143 transitions. [2024-06-27 18:59:11,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 234 transitions, 3362 flow [2024-06-27 18:59:12,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 234 transitions, 3123 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 18:59:12,012 INFO L231 Difference]: Finished difference. Result has 176 places, 205 transitions, 2536 flow [2024-06-27 18:59:12,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2277, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2536, PETRI_PLACES=176, PETRI_TRANSITIONS=205} [2024-06-27 18:59:12,014 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 125 predicate places. [2024-06-27 18:59:12,015 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 205 transitions, 2536 flow [2024-06-27 18:59:12,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:12,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:12,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:12,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:59:12,015 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:12,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:12,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1846968752, now seen corresponding path program 2 times [2024-06-27 18:59:12,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:12,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120325329] [2024-06-27 18:59:12,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:12,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:13,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:13,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120325329] [2024-06-27 18:59:13,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120325329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:13,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:13,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:13,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365547168] [2024-06-27 18:59:13,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:13,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:13,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:13,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:13,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:13,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 205 transitions, 2536 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:13,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:13,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:13,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:15,438 INFO L124 PetriNetUnfolderBase]: 5891/9375 cut-off events. [2024-06-27 18:59:15,438 INFO L125 PetriNetUnfolderBase]: For 149189/149191 co-relation queries the response was YES. [2024-06-27 18:59:15,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48117 conditions, 9375 events. 5891/9375 cut-off events. For 149189/149191 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 60698 event pairs, 1585 based on Foata normal form. 1/9374 useless extension candidates. Maximal degree in co-relation 48033. Up to 8570 conditions per place. [2024-06-27 18:59:15,533 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 209 selfloop transitions, 25 changer transitions 0/241 dead transitions. [2024-06-27 18:59:15,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 241 transitions, 3226 flow [2024-06-27 18:59:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:15,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 18:59:15,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177304964539007 [2024-06-27 18:59:15,542 INFO L175 Difference]: Start difference. First operand has 176 places, 205 transitions, 2536 flow. Second operand 6 states and 146 transitions. [2024-06-27 18:59:15,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 241 transitions, 3226 flow [2024-06-27 18:59:15,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 241 transitions, 3118 flow, removed 53 selfloop flow, removed 1 redundant places. [2024-06-27 18:59:15,934 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 2568 flow [2024-06-27 18:59:15,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2568, PETRI_PLACES=182, PETRI_TRANSITIONS=209} [2024-06-27 18:59:15,934 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 131 predicate places. [2024-06-27 18:59:15,934 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 2568 flow [2024-06-27 18:59:15,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:15,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:15,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:15,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:59:15,935 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:15,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:15,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1975256529, now seen corresponding path program 1 times [2024-06-27 18:59:15,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:15,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483003638] [2024-06-27 18:59:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:15,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:18,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:18,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483003638] [2024-06-27 18:59:18,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483003638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:18,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:18,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682914650] [2024-06-27 18:59:18,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:18,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:18,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:18,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:18,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 209 transitions, 2568 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:18,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:18,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:18,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:20,479 INFO L124 PetriNetUnfolderBase]: 5792/9044 cut-off events. [2024-06-27 18:59:20,479 INFO L125 PetriNetUnfolderBase]: For 156106/156162 co-relation queries the response was YES. [2024-06-27 18:59:20,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47829 conditions, 9044 events. 5792/9044 cut-off events. For 156106/156162 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 57370 event pairs, 1126 based on Foata normal form. 52/9023 useless extension candidates. Maximal degree in co-relation 47741. Up to 8049 conditions per place. [2024-06-27 18:59:20,584 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 206 selfloop transitions, 56 changer transitions 0/281 dead transitions. [2024-06-27 18:59:20,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 281 transitions, 3568 flow [2024-06-27 18:59:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 18:59:20,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 18:59:20,586 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 2568 flow. Second operand 8 states and 199 transitions. [2024-06-27 18:59:20,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 281 transitions, 3568 flow [2024-06-27 18:59:20,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 281 transitions, 3528 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 18:59:20,930 INFO L231 Difference]: Finished difference. Result has 188 places, 230 transitions, 2918 flow [2024-06-27 18:59:20,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2918, PETRI_PLACES=188, PETRI_TRANSITIONS=230} [2024-06-27 18:59:20,930 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 137 predicate places. [2024-06-27 18:59:20,930 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 230 transitions, 2918 flow [2024-06-27 18:59:20,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:20,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:20,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:20,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:59:20,931 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:20,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:20,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1421689707, now seen corresponding path program 2 times [2024-06-27 18:59:20,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:20,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195247282] [2024-06-27 18:59:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:20,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:23,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:23,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:23,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195247282] [2024-06-27 18:59:23,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195247282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:23,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:23,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:23,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035220630] [2024-06-27 18:59:23,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:23,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:23,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:23,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:23,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:23,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:23,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 230 transitions, 2918 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:23,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:23,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:23,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:24,996 INFO L124 PetriNetUnfolderBase]: 5781/9028 cut-off events. [2024-06-27 18:59:24,996 INFO L125 PetriNetUnfolderBase]: For 166445/166508 co-relation queries the response was YES. [2024-06-27 18:59:25,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49494 conditions, 9028 events. 5781/9028 cut-off events. For 166445/166508 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 57426 event pairs, 1160 based on Foata normal form. 59/9005 useless extension candidates. Maximal degree in co-relation 49403. Up to 7967 conditions per place. [2024-06-27 18:59:25,095 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 191 selfloop transitions, 58 changer transitions 0/268 dead transitions. [2024-06-27 18:59:25,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 268 transitions, 3674 flow [2024-06-27 18:59:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:25,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 18:59:25,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2024-06-27 18:59:25,097 INFO L175 Difference]: Start difference. First operand has 188 places, 230 transitions, 2918 flow. Second operand 6 states and 148 transitions. [2024-06-27 18:59:25,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 268 transitions, 3674 flow [2024-06-27 18:59:25,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 268 transitions, 3613 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:25,416 INFO L231 Difference]: Finished difference. Result has 193 places, 237 transitions, 3087 flow [2024-06-27 18:59:25,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3087, PETRI_PLACES=193, PETRI_TRANSITIONS=237} [2024-06-27 18:59:25,417 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 142 predicate places. [2024-06-27 18:59:25,417 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 237 transitions, 3087 flow [2024-06-27 18:59:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:25,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:25,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:25,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:59:25,418 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:25,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1421273997, now seen corresponding path program 3 times [2024-06-27 18:59:25,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:25,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227008361] [2024-06-27 18:59:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:27,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:27,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227008361] [2024-06-27 18:59:27,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227008361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:27,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:27,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:27,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706554687] [2024-06-27 18:59:27,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:27,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:27,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:27,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:27,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:27,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 237 transitions, 3087 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:27,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:27,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:27,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:29,564 INFO L124 PetriNetUnfolderBase]: 5772/9037 cut-off events. [2024-06-27 18:59:29,564 INFO L125 PetriNetUnfolderBase]: For 173360/173416 co-relation queries the response was YES. [2024-06-27 18:59:29,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50840 conditions, 9037 events. 5772/9037 cut-off events. For 173360/173416 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 57559 event pairs, 1146 based on Foata normal form. 52/9021 useless extension candidates. Maximal degree in co-relation 50746. Up to 8043 conditions per place. [2024-06-27 18:59:29,654 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 199 selfloop transitions, 54 changer transitions 0/272 dead transitions. [2024-06-27 18:59:29,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 272 transitions, 3697 flow [2024-06-27 18:59:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:59:29,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425531914893617 [2024-06-27 18:59:29,656 INFO L175 Difference]: Start difference. First operand has 193 places, 237 transitions, 3087 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:59:29,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 272 transitions, 3697 flow [2024-06-27 18:59:29,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 272 transitions, 3596 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:29,993 INFO L231 Difference]: Finished difference. Result has 197 places, 237 transitions, 3114 flow [2024-06-27 18:59:29,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=2986, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3114, PETRI_PLACES=197, PETRI_TRANSITIONS=237} [2024-06-27 18:59:29,994 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 146 predicate places. [2024-06-27 18:59:29,994 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 237 transitions, 3114 flow [2024-06-27 18:59:29,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:29,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:29,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:29,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:59:29,994 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:29,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:29,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1745769963, now seen corresponding path program 1 times [2024-06-27 18:59:29,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:29,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283586854] [2024-06-27 18:59:29,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:29,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:30,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:31,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:31,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283586854] [2024-06-27 18:59:31,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283586854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:31,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:31,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397534487] [2024-06-27 18:59:31,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:31,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:31,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:31,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:31,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:31,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:31,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 237 transitions, 3114 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:31,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:31,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:31,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:33,533 INFO L124 PetriNetUnfolderBase]: 6198/9851 cut-off events. [2024-06-27 18:59:33,533 INFO L125 PetriNetUnfolderBase]: For 179062/179070 co-relation queries the response was YES. [2024-06-27 18:59:33,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53599 conditions, 9851 events. 6198/9851 cut-off events. For 179062/179070 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 64125 event pairs, 1630 based on Foata normal form. 5/9853 useless extension candidates. Maximal degree in co-relation 53503. Up to 8951 conditions per place. [2024-06-27 18:59:33,647 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 228 selfloop transitions, 34 changer transitions 0/269 dead transitions. [2024-06-27 18:59:33,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 269 transitions, 3858 flow [2024-06-27 18:59:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:33,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-27 18:59:33,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5035460992907801 [2024-06-27 18:59:33,648 INFO L175 Difference]: Start difference. First operand has 197 places, 237 transitions, 3114 flow. Second operand 6 states and 142 transitions. [2024-06-27 18:59:33,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 269 transitions, 3858 flow [2024-06-27 18:59:34,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 269 transitions, 3744 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 18:59:34,044 INFO L231 Difference]: Finished difference. Result has 198 places, 241 transitions, 3137 flow [2024-06-27 18:59:34,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3137, PETRI_PLACES=198, PETRI_TRANSITIONS=241} [2024-06-27 18:59:34,045 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 147 predicate places. [2024-06-27 18:59:34,045 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 241 transitions, 3137 flow [2024-06-27 18:59:34,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:34,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:34,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:34,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:59:34,049 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:34,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash -235442901, now seen corresponding path program 1 times [2024-06-27 18:59:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:34,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690262630] [2024-06-27 18:59:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:35,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:35,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690262630] [2024-06-27 18:59:35,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690262630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:35,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:35,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:35,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580345018] [2024-06-27 18:59:35,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:35,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:35,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 241 transitions, 3137 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:35,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:35,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:35,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:38,191 INFO L124 PetriNetUnfolderBase]: 6234/9831 cut-off events. [2024-06-27 18:59:38,192 INFO L125 PetriNetUnfolderBase]: For 184379/184381 co-relation queries the response was YES. [2024-06-27 18:59:38,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53702 conditions, 9831 events. 6234/9831 cut-off events. For 184379/184381 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 63325 event pairs, 1627 based on Foata normal form. 2/9829 useless extension candidates. Maximal degree in co-relation 53605. Up to 8853 conditions per place. [2024-06-27 18:59:38,279 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 236 selfloop transitions, 47 changer transitions 0/290 dead transitions. [2024-06-27 18:59:38,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 290 transitions, 4155 flow [2024-06-27 18:59:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:59:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:59:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-27 18:59:38,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5106382978723404 [2024-06-27 18:59:38,303 INFO L175 Difference]: Start difference. First operand has 198 places, 241 transitions, 3137 flow. Second operand 7 states and 168 transitions. [2024-06-27 18:59:38,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 290 transitions, 4155 flow [2024-06-27 18:59:38,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 290 transitions, 4031 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 18:59:38,667 INFO L231 Difference]: Finished difference. Result has 202 places, 253 transitions, 3342 flow [2024-06-27 18:59:38,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3013, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3342, PETRI_PLACES=202, PETRI_TRANSITIONS=253} [2024-06-27 18:59:38,669 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 151 predicate places. [2024-06-27 18:59:38,669 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 253 transitions, 3342 flow [2024-06-27 18:59:38,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:38,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:38,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:38,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:59:38,670 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:38,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash -538584393, now seen corresponding path program 2 times [2024-06-27 18:59:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382545085] [2024-06-27 18:59:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:38,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:38,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:40,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:40,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382545085] [2024-06-27 18:59:40,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382545085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:40,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:40,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:40,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576683333] [2024-06-27 18:59:40,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:40,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:40,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:40,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:40,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:40,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:40,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 253 transitions, 3342 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:40,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:40,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:40,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:42,837 INFO L124 PetriNetUnfolderBase]: 6231/9836 cut-off events. [2024-06-27 18:59:42,837 INFO L125 PetriNetUnfolderBase]: For 193880/193882 co-relation queries the response was YES. [2024-06-27 18:59:42,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55185 conditions, 9836 events. 6231/9836 cut-off events. For 193880/193882 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 63462 event pairs, 1631 based on Foata normal form. 1/9833 useless extension candidates. Maximal degree in co-relation 55087. Up to 8996 conditions per place. [2024-06-27 18:59:42,951 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 243 selfloop transitions, 36 changer transitions 0/286 dead transitions. [2024-06-27 18:59:42,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 286 transitions, 4074 flow [2024-06-27 18:59:42,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:59:42,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:59:42,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-27 18:59:42,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49240121580547114 [2024-06-27 18:59:42,953 INFO L175 Difference]: Start difference. First operand has 202 places, 253 transitions, 3342 flow. Second operand 7 states and 162 transitions. [2024-06-27 18:59:42,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 286 transitions, 4074 flow [2024-06-27 18:59:43,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 286 transitions, 3989 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-27 18:59:43,418 INFO L231 Difference]: Finished difference. Result has 207 places, 253 transitions, 3336 flow [2024-06-27 18:59:43,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3336, PETRI_PLACES=207, PETRI_TRANSITIONS=253} [2024-06-27 18:59:43,419 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 156 predicate places. [2024-06-27 18:59:43,419 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 253 transitions, 3336 flow [2024-06-27 18:59:43,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:43,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:43,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:43,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:59:43,420 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:43,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1421695659, now seen corresponding path program 2 times [2024-06-27 18:59:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739407689] [2024-06-27 18:59:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:45,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:45,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739407689] [2024-06-27 18:59:45,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739407689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:45,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:45,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:45,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630510713] [2024-06-27 18:59:45,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:45,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:45,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:45,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:45,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:45,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 253 transitions, 3336 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:45,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:45,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:45,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:47,845 INFO L124 PetriNetUnfolderBase]: 6309/9950 cut-off events. [2024-06-27 18:59:47,845 INFO L125 PetriNetUnfolderBase]: For 199187/199189 co-relation queries the response was YES. [2024-06-27 18:59:47,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55535 conditions, 9950 events. 6309/9950 cut-off events. For 199187/199189 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 64070 event pairs, 1588 based on Foata normal form. 2/9950 useless extension candidates. Maximal degree in co-relation 55434. Up to 9006 conditions per place. [2024-06-27 18:59:47,943 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 258 selfloop transitions, 38 changer transitions 0/303 dead transitions. [2024-06-27 18:59:47,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 303 transitions, 4337 flow [2024-06-27 18:59:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:59:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:59:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-27 18:59:47,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973404255319149 [2024-06-27 18:59:47,945 INFO L175 Difference]: Start difference. First operand has 207 places, 253 transitions, 3336 flow. Second operand 8 states and 187 transitions. [2024-06-27 18:59:47,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 303 transitions, 4337 flow [2024-06-27 18:59:48,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 303 transitions, 4211 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 18:59:48,286 INFO L231 Difference]: Finished difference. Result has 209 places, 261 transitions, 3436 flow [2024-06-27 18:59:48,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3436, PETRI_PLACES=209, PETRI_TRANSITIONS=261} [2024-06-27 18:59:48,287 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-06-27 18:59:48,287 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 261 transitions, 3436 flow [2024-06-27 18:59:48,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:48,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:48,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:48,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:59:48,288 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:48,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1421458323, now seen corresponding path program 3 times [2024-06-27 18:59:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621799619] [2024-06-27 18:59:48,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:48,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:49,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:49,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621799619] [2024-06-27 18:59:49,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621799619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:49,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:49,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:59:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253880695] [2024-06-27 18:59:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:49,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:59:49,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:59:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:59:49,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:49,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 261 transitions, 3436 flow. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:49,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:49,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:49,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:52,094 INFO L124 PetriNetUnfolderBase]: 6306/9946 cut-off events. [2024-06-27 18:59:52,094 INFO L125 PetriNetUnfolderBase]: For 203309/203311 co-relation queries the response was YES. [2024-06-27 18:59:52,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55633 conditions, 9946 events. 6306/9946 cut-off events. For 203309/203311 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 64120 event pairs, 1613 based on Foata normal form. 1/9945 useless extension candidates. Maximal degree in co-relation 55531. Up to 9130 conditions per place. [2024-06-27 18:59:52,212 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 260 selfloop transitions, 25 changer transitions 0/292 dead transitions. [2024-06-27 18:59:52,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 292 transitions, 4090 flow [2024-06-27 18:59:52,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:59:52,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:59:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-27 18:59:52,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141843971631206 [2024-06-27 18:59:52,213 INFO L175 Difference]: Start difference. First operand has 209 places, 261 transitions, 3436 flow. Second operand 6 states and 145 transitions. [2024-06-27 18:59:52,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 292 transitions, 4090 flow [2024-06-27 18:59:52,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 292 transitions, 3933 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:52,674 INFO L231 Difference]: Finished difference. Result has 209 places, 261 transitions, 3341 flow [2024-06-27 18:59:52,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3279, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3341, PETRI_PLACES=209, PETRI_TRANSITIONS=261} [2024-06-27 18:59:52,674 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 158 predicate places. [2024-06-27 18:59:52,674 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 261 transitions, 3341 flow [2024-06-27 18:59:52,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:52,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:52,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:59:52,675 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:52,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash -395944527, now seen corresponding path program 3 times [2024-06-27 18:59:52,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:52,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246235307] [2024-06-27 18:59:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:54,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:54,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246235307] [2024-06-27 18:59:54,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246235307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:54,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:54,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:59:54,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125006088] [2024-06-27 18:59:54,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:54,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:59:54,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:54,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:59:54,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:59:54,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 18:59:54,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 261 transitions, 3341 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:54,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:54,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 18:59:54,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:59:56,680 INFO L124 PetriNetUnfolderBase]: 6300/9950 cut-off events. [2024-06-27 18:59:56,680 INFO L125 PetriNetUnfolderBase]: For 204610/204612 co-relation queries the response was YES. [2024-06-27 18:59:56,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55190 conditions, 9950 events. 6300/9950 cut-off events. For 204610/204612 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 64176 event pairs, 1597 based on Foata normal form. 2/9950 useless extension candidates. Maximal degree in co-relation 55088. Up to 9001 conditions per place. [2024-06-27 18:59:56,772 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 256 selfloop transitions, 39 changer transitions 0/302 dead transitions. [2024-06-27 18:59:56,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 302 transitions, 4131 flow [2024-06-27 18:59:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:59:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:59:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:59:56,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5258358662613982 [2024-06-27 18:59:56,774 INFO L175 Difference]: Start difference. First operand has 209 places, 261 transitions, 3341 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:59:56,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 302 transitions, 4131 flow [2024-06-27 18:59:57,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 302 transitions, 4040 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:59:57,157 INFO L231 Difference]: Finished difference. Result has 210 places, 261 transitions, 3337 flow [2024-06-27 18:59:57,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3252, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3337, PETRI_PLACES=210, PETRI_TRANSITIONS=261} [2024-06-27 18:59:57,157 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 159 predicate places. [2024-06-27 18:59:57,158 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 261 transitions, 3337 flow [2024-06-27 18:59:57,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:57,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:59:57,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:59:57,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:59:57,158 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 18:59:57,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:59:57,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1421704587, now seen corresponding path program 1 times [2024-06-27 18:59:57,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:59:57,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610920114] [2024-06-27 18:59:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:59:57,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:59:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:59:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:59:59,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:59:59,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610920114] [2024-06-27 18:59:59,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610920114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:59:59,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:59:59,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:59:59,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164901811] [2024-06-27 18:59:59,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:59:59,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:59:59,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:59:59,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:59:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:59:59,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 18:59:59,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 261 transitions, 3337 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:59:59,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:59:59,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 18:59:59,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:01,777 INFO L124 PetriNetUnfolderBase]: 5876/9376 cut-off events. [2024-06-27 19:00:01,778 INFO L125 PetriNetUnfolderBase]: For 198568/198632 co-relation queries the response was YES. [2024-06-27 19:00:01,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52275 conditions, 9376 events. 5876/9376 cut-off events. For 198568/198632 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 61318 event pairs, 1504 based on Foata normal form. 58/9367 useless extension candidates. Maximal degree in co-relation 52173. Up to 8473 conditions per place. [2024-06-27 19:00:01,907 INFO L140 encePairwiseOnDemand]: 39/47 looper letters, 254 selfloop transitions, 16 changer transitions 0/289 dead transitions. [2024-06-27 19:00:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 289 transitions, 3993 flow [2024-06-27 19:00:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:00:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:00:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-27 19:00:01,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:00:01,909 INFO L175 Difference]: Start difference. First operand has 210 places, 261 transitions, 3337 flow. Second operand 6 states and 141 transitions. [2024-06-27 19:00:01,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 289 transitions, 3993 flow [2024-06-27 19:00:02,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 289 transitions, 3905 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:02,416 INFO L231 Difference]: Finished difference. Result has 211 places, 264 transitions, 3345 flow [2024-06-27 19:00:02,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3345, PETRI_PLACES=211, PETRI_TRANSITIONS=264} [2024-06-27 19:00:02,417 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 160 predicate places. [2024-06-27 19:00:02,417 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 264 transitions, 3345 flow [2024-06-27 19:00:02,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:02,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:02,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:02,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:00:02,418 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:02,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash -620801961, now seen corresponding path program 1 times [2024-06-27 19:00:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:02,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889108452] [2024-06-27 19:00:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889108452] [2024-06-27 19:00:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889108452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:05,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:05,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022383596] [2024-06-27 19:00:05,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:05,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:05,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:05,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:05,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:05,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:05,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 264 transitions, 3345 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:05,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:05,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:05,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:07,660 INFO L124 PetriNetUnfolderBase]: 6344/9755 cut-off events. [2024-06-27 19:00:07,660 INFO L125 PetriNetUnfolderBase]: For 210964/210972 co-relation queries the response was YES. [2024-06-27 19:00:07,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55818 conditions, 9755 events. 6344/9755 cut-off events. For 210964/210972 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 60824 event pairs, 1175 based on Foata normal form. 9/9759 useless extension candidates. Maximal degree in co-relation 55715. Up to 8756 conditions per place. [2024-06-27 19:00:07,777 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 261 selfloop transitions, 61 changer transitions 0/329 dead transitions. [2024-06-27 19:00:07,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 329 transitions, 4619 flow [2024-06-27 19:00:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:07,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:00:07,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 19:00:07,778 INFO L175 Difference]: Start difference. First operand has 211 places, 264 transitions, 3345 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:00:07,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 329 transitions, 4619 flow [2024-06-27 19:00:08,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 329 transitions, 4541 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 19:00:08,328 INFO L231 Difference]: Finished difference. Result has 216 places, 276 transitions, 3640 flow [2024-06-27 19:00:08,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3267, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3640, PETRI_PLACES=216, PETRI_TRANSITIONS=276} [2024-06-27 19:00:08,329 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 165 predicate places. [2024-06-27 19:00:08,329 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 276 transitions, 3640 flow [2024-06-27 19:00:08,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:08,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:08,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:08,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:00:08,330 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:08,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1103416115, now seen corresponding path program 2 times [2024-06-27 19:00:08,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:08,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425242213] [2024-06-27 19:00:08,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:08,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:11,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425242213] [2024-06-27 19:00:11,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425242213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:11,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:11,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350151981] [2024-06-27 19:00:11,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:11,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:11,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:11,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:11,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:11,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 276 transitions, 3640 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:11,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:11,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:11,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:13,444 INFO L124 PetriNetUnfolderBase]: 6473/9988 cut-off events. [2024-06-27 19:00:13,445 INFO L125 PetriNetUnfolderBase]: For 228446/228448 co-relation queries the response was YES. [2024-06-27 19:00:13,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59175 conditions, 9988 events. 6473/9988 cut-off events. For 228446/228448 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 62483 event pairs, 1200 based on Foata normal form. 1/9987 useless extension candidates. Maximal degree in co-relation 59069. Up to 9045 conditions per place. [2024-06-27 19:00:13,741 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 274 selfloop transitions, 66 changer transitions 0/347 dead transitions. [2024-06-27 19:00:13,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 347 transitions, 4907 flow [2024-06-27 19:00:13,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:00:13,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:00:13,742 INFO L175 Difference]: Start difference. First operand has 216 places, 276 transitions, 3640 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:00:13,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 347 transitions, 4907 flow [2024-06-27 19:00:14,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 347 transitions, 4821 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:14,236 INFO L231 Difference]: Finished difference. Result has 224 places, 294 transitions, 4014 flow [2024-06-27 19:00:14,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3568, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4014, PETRI_PLACES=224, PETRI_TRANSITIONS=294} [2024-06-27 19:00:14,236 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 173 predicate places. [2024-06-27 19:00:14,236 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 294 transitions, 4014 flow [2024-06-27 19:00:14,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:14,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:14,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:14,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:00:14,238 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:14,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1707991179, now seen corresponding path program 3 times [2024-06-27 19:00:14,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:14,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275391587] [2024-06-27 19:00:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:16,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:16,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275391587] [2024-06-27 19:00:16,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275391587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:16,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:16,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:16,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720261694] [2024-06-27 19:00:16,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:16,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:16,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:16,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:16,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:16,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:16,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 294 transitions, 4014 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:16,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:16,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:16,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:18,708 INFO L124 PetriNetUnfolderBase]: 6496/9981 cut-off events. [2024-06-27 19:00:18,708 INFO L125 PetriNetUnfolderBase]: For 240796/240812 co-relation queries the response was YES. [2024-06-27 19:00:18,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59861 conditions, 9981 events. 6496/9981 cut-off events. For 240796/240812 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 62277 event pairs, 1233 based on Foata normal form. 15/9987 useless extension candidates. Maximal degree in co-relation 59751. Up to 8923 conditions per place. [2024-06-27 19:00:18,988 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 271 selfloop transitions, 75 changer transitions 0/353 dead transitions. [2024-06-27 19:00:18,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 353 transitions, 5404 flow [2024-06-27 19:00:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:00:18,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:00:18,989 INFO L175 Difference]: Start difference. First operand has 224 places, 294 transitions, 4014 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:00:18,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 353 transitions, 5404 flow [2024-06-27 19:00:19,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 353 transitions, 5244 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:19,480 INFO L231 Difference]: Finished difference. Result has 227 places, 303 transitions, 4238 flow [2024-06-27 19:00:19,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4238, PETRI_PLACES=227, PETRI_TRANSITIONS=303} [2024-06-27 19:00:19,481 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 176 predicate places. [2024-06-27 19:00:19,481 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 303 transitions, 4238 flow [2024-06-27 19:00:19,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:19,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:19,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:19,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:00:19,482 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:19,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash 98407629, now seen corresponding path program 4 times [2024-06-27 19:00:19,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:19,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458821147] [2024-06-27 19:00:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:19,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:21,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:21,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458821147] [2024-06-27 19:00:21,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458821147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:21,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:21,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:21,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446642221] [2024-06-27 19:00:21,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:21,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:21,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:21,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:21,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:21,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 303 transitions, 4238 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:21,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:21,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:21,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:24,068 INFO L124 PetriNetUnfolderBase]: 6524/10023 cut-off events. [2024-06-27 19:00:24,068 INFO L125 PetriNetUnfolderBase]: For 250247/250263 co-relation queries the response was YES. [2024-06-27 19:00:24,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60657 conditions, 10023 events. 6524/10023 cut-off events. For 250247/250263 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 62505 event pairs, 1233 based on Foata normal form. 15/10029 useless extension candidates. Maximal degree in co-relation 60545. Up to 8941 conditions per place. [2024-06-27 19:00:24,192 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 267 selfloop transitions, 80 changer transitions 0/354 dead transitions. [2024-06-27 19:00:24,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 354 transitions, 5471 flow [2024-06-27 19:00:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:00:24,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167173252279635 [2024-06-27 19:00:24,194 INFO L175 Difference]: Start difference. First operand has 227 places, 303 transitions, 4238 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:00:24,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 354 transitions, 5471 flow [2024-06-27 19:00:24,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 354 transitions, 5375 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-06-27 19:00:24,903 INFO L231 Difference]: Finished difference. Result has 234 places, 309 transitions, 4468 flow [2024-06-27 19:00:24,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4468, PETRI_PLACES=234, PETRI_TRANSITIONS=309} [2024-06-27 19:00:24,904 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 183 predicate places. [2024-06-27 19:00:24,904 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 309 transitions, 4468 flow [2024-06-27 19:00:24,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:24,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:24,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:24,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:00:24,905 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:24,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:24,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1109964817, now seen corresponding path program 5 times [2024-06-27 19:00:24,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:24,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409209718] [2024-06-27 19:00:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:24,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:27,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:27,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409209718] [2024-06-27 19:00:27,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409209718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:27,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:27,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:27,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512557170] [2024-06-27 19:00:27,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:27,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:27,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:27,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:27,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:27,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:27,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 309 transitions, 4468 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:27,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:27,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:27,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:29,497 INFO L124 PetriNetUnfolderBase]: 6552/10089 cut-off events. [2024-06-27 19:00:29,498 INFO L125 PetriNetUnfolderBase]: For 249988/249996 co-relation queries the response was YES. [2024-06-27 19:00:29,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61127 conditions, 10089 events. 6552/10089 cut-off events. For 249988/249996 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 63143 event pairs, 1220 based on Foata normal form. 3/10084 useless extension candidates. Maximal degree in co-relation 61011. Up to 8728 conditions per place. [2024-06-27 19:00:29,640 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 233 selfloop transitions, 125 changer transitions 0/365 dead transitions. [2024-06-27 19:00:29,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 365 transitions, 5701 flow [2024-06-27 19:00:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:00:29,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:00:29,641 INFO L175 Difference]: Start difference. First operand has 234 places, 309 transitions, 4468 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:00:29,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 365 transitions, 5701 flow [2024-06-27 19:00:30,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 365 transitions, 5501 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-27 19:00:30,411 INFO L231 Difference]: Finished difference. Result has 239 places, 314 transitions, 4683 flow [2024-06-27 19:00:30,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4683, PETRI_PLACES=239, PETRI_TRANSITIONS=314} [2024-06-27 19:00:30,412 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 188 predicate places. [2024-06-27 19:00:30,412 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 314 transitions, 4683 flow [2024-06-27 19:00:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:30,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:30,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:30,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:00:30,413 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:30,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:30,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1109815087, now seen corresponding path program 6 times [2024-06-27 19:00:30,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:30,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929229556] [2024-06-27 19:00:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:30,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:32,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:32,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929229556] [2024-06-27 19:00:32,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929229556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:32,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:32,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963737143] [2024-06-27 19:00:32,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:32,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:32,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:32,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:32,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:32,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:32,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 314 transitions, 4683 flow. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:32,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:32,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:32,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:35,563 INFO L124 PetriNetUnfolderBase]: 6549/10134 cut-off events. [2024-06-27 19:00:35,564 INFO L125 PetriNetUnfolderBase]: For 253458/253460 co-relation queries the response was YES. [2024-06-27 19:00:35,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61782 conditions, 10134 events. 6549/10134 cut-off events. For 253458/253460 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 63989 event pairs, 1190 based on Foata normal form. 1/10133 useless extension candidates. Maximal degree in co-relation 61664. Up to 8726 conditions per place. [2024-06-27 19:00:35,702 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 242 selfloop transitions, 127 changer transitions 0/376 dead transitions. [2024-06-27 19:00:35,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 376 transitions, 5758 flow [2024-06-27 19:00:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:00:35,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 19:00:35,704 INFO L175 Difference]: Start difference. First operand has 239 places, 314 transitions, 4683 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:00:35,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 376 transitions, 5758 flow [2024-06-27 19:00:36,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 376 transitions, 5533 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 19:00:36,347 INFO L231 Difference]: Finished difference. Result has 242 places, 315 transitions, 4803 flow [2024-06-27 19:00:36,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4803, PETRI_PLACES=242, PETRI_TRANSITIONS=315} [2024-06-27 19:00:36,348 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 191 predicate places. [2024-06-27 19:00:36,348 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 315 transitions, 4803 flow [2024-06-27 19:00:36,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:36,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:36,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:00:36,349 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:36,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 94696650, now seen corresponding path program 1 times [2024-06-27 19:00:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929440860] [2024-06-27 19:00:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929440860] [2024-06-27 19:00:38,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929440860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:38,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:38,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:38,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986306454] [2024-06-27 19:00:38,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:38,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:38,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:38,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:38,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 315 transitions, 4803 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:38,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:38,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:38,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:40,762 INFO L124 PetriNetUnfolderBase]: 6585/10389 cut-off events. [2024-06-27 19:00:40,763 INFO L125 PetriNetUnfolderBase]: For 264456/264464 co-relation queries the response was YES. [2024-06-27 19:00:40,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62666 conditions, 10389 events. 6585/10389 cut-off events. For 264456/264464 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 67520 event pairs, 1669 based on Foata normal form. 6/10392 useless extension candidates. Maximal degree in co-relation 62548. Up to 9271 conditions per place. [2024-06-27 19:00:40,897 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 292 selfloop transitions, 56 changer transitions 0/355 dead transitions. [2024-06-27 19:00:40,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 355 transitions, 5763 flow [2024-06-27 19:00:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:00:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:00:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-27 19:00:40,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075987841945289 [2024-06-27 19:00:40,899 INFO L175 Difference]: Start difference. First operand has 242 places, 315 transitions, 4803 flow. Second operand 7 states and 167 transitions. [2024-06-27 19:00:40,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 355 transitions, 5763 flow [2024-06-27 19:00:41,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 355 transitions, 5562 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:41,442 INFO L231 Difference]: Finished difference. Result has 244 places, 319 transitions, 4789 flow [2024-06-27 19:00:41,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4789, PETRI_PLACES=244, PETRI_TRANSITIONS=319} [2024-06-27 19:00:41,443 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 193 predicate places. [2024-06-27 19:00:41,443 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 319 transitions, 4789 flow [2024-06-27 19:00:41,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:41,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:41,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:00:41,444 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:41,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1291206520, now seen corresponding path program 2 times [2024-06-27 19:00:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:41,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170838955] [2024-06-27 19:00:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:43,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:43,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:43,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170838955] [2024-06-27 19:00:43,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170838955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:43,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:43,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974001457] [2024-06-27 19:00:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:43,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:43,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:43,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:43,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 319 transitions, 4789 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:43,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:43,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:43,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:46,968 INFO L124 PetriNetUnfolderBase]: 6621/10424 cut-off events. [2024-06-27 19:00:46,969 INFO L125 PetriNetUnfolderBase]: For 262269/262271 co-relation queries the response was YES. [2024-06-27 19:00:47,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62573 conditions, 10424 events. 6621/10424 cut-off events. For 262269/262271 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 67590 event pairs, 1661 based on Foata normal form. 2/10422 useless extension candidates. Maximal degree in co-relation 62454. Up to 9303 conditions per place. [2024-06-27 19:00:47,281 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 306 selfloop transitions, 64 changer transitions 0/377 dead transitions. [2024-06-27 19:00:47,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 377 transitions, 5949 flow [2024-06-27 19:00:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:00:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:00:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-27 19:00:47,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48936170212765956 [2024-06-27 19:00:47,283 INFO L175 Difference]: Start difference. First operand has 244 places, 319 transitions, 4789 flow. Second operand 10 states and 230 transitions. [2024-06-27 19:00:47,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 377 transitions, 5949 flow [2024-06-27 19:00:47,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 377 transitions, 5759 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:00:47,754 INFO L231 Difference]: Finished difference. Result has 249 places, 323 transitions, 4808 flow [2024-06-27 19:00:47,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4613, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4808, PETRI_PLACES=249, PETRI_TRANSITIONS=323} [2024-06-27 19:00:47,755 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 198 predicate places. [2024-06-27 19:00:47,755 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 323 transitions, 4808 flow [2024-06-27 19:00:47,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:47,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:47,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:47,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:00:47,756 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:47,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash 98415720, now seen corresponding path program 3 times [2024-06-27 19:00:47,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:47,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705021320] [2024-06-27 19:00:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:49,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:49,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705021320] [2024-06-27 19:00:49,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705021320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:49,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:49,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:00:49,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122348428] [2024-06-27 19:00:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:00:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:49,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:00:49,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:00:49,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:49,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 323 transitions, 4808 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:49,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:49,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:49,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:52,641 INFO L124 PetriNetUnfolderBase]: 6615/10405 cut-off events. [2024-06-27 19:00:52,641 INFO L125 PetriNetUnfolderBase]: For 263652/263654 co-relation queries the response was YES. [2024-06-27 19:00:52,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62329 conditions, 10405 events. 6615/10405 cut-off events. For 263652/263654 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 67222 event pairs, 1658 based on Foata normal form. 2/10403 useless extension candidates. Maximal degree in co-relation 62210. Up to 9298 conditions per place. [2024-06-27 19:00:52,768 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 296 selfloop transitions, 63 changer transitions 0/366 dead transitions. [2024-06-27 19:00:52,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 366 transitions, 5742 flow [2024-06-27 19:00:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:52,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:00:52,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-27 19:00:52,770 INFO L175 Difference]: Start difference. First operand has 249 places, 323 transitions, 4808 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:00:52,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 366 transitions, 5742 flow [2024-06-27 19:00:53,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 366 transitions, 5480 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-27 19:00:53,378 INFO L231 Difference]: Finished difference. Result has 247 places, 323 transitions, 4679 flow [2024-06-27 19:00:53,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4679, PETRI_PLACES=247, PETRI_TRANSITIONS=323} [2024-06-27 19:00:53,379 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 196 predicate places. [2024-06-27 19:00:53,379 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 323 transitions, 4679 flow [2024-06-27 19:00:53,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:53,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:53,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:53,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:00:53,380 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:53,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:53,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1122894328, now seen corresponding path program 4 times [2024-06-27 19:00:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:53,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820795687] [2024-06-27 19:00:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:00:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:00:55,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:00:55,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820795687] [2024-06-27 19:00:55,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820795687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:00:55,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:00:55,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:00:55,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337306383] [2024-06-27 19:00:55,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:00:55,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:00:55,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:00:55,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:00:55,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:00:55,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:00:55,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 323 transitions, 4679 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:55,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:00:55,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:00:55,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:00:57,708 INFO L124 PetriNetUnfolderBase]: 6651/10474 cut-off events. [2024-06-27 19:00:57,709 INFO L125 PetriNetUnfolderBase]: For 266656/266658 co-relation queries the response was YES. [2024-06-27 19:00:57,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62193 conditions, 10474 events. 6651/10474 cut-off events. For 266656/266658 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 67903 event pairs, 1612 based on Foata normal form. 2/10474 useless extension candidates. Maximal degree in co-relation 62075. Up to 9457 conditions per place. [2024-06-27 19:00:57,844 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 318 selfloop transitions, 43 changer transitions 0/368 dead transitions. [2024-06-27 19:00:57,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 368 transitions, 5663 flow [2024-06-27 19:00:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:00:57,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:00:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-27 19:00:57,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4946808510638298 [2024-06-27 19:00:57,846 INFO L175 Difference]: Start difference. First operand has 247 places, 323 transitions, 4679 flow. Second operand 8 states and 186 transitions. [2024-06-27 19:00:57,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 368 transitions, 5663 flow [2024-06-27 19:00:58,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 368 transitions, 5525 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:00:58,561 INFO L231 Difference]: Finished difference. Result has 248 places, 327 transitions, 4683 flow [2024-06-27 19:00:58,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4683, PETRI_PLACES=248, PETRI_TRANSITIONS=327} [2024-06-27 19:00:58,562 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 197 predicate places. [2024-06-27 19:00:58,562 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 327 transitions, 4683 flow [2024-06-27 19:00:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:00:58,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:00:58,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:00:58,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:00:58,563 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:00:58,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:00:58,563 INFO L85 PathProgramCache]: Analyzing trace with hash 610617830, now seen corresponding path program 5 times [2024-06-27 19:00:58,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:00:58,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897734066] [2024-06-27 19:00:58,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:00:58,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:00:58,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:00,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:00,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897734066] [2024-06-27 19:01:00,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897734066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:00,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:00,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:00,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581087769] [2024-06-27 19:01:00,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:00,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:00,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:00,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:00,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:00,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 327 transitions, 4683 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:00,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:00,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:00,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:02,736 INFO L124 PetriNetUnfolderBase]: 6645/10472 cut-off events. [2024-06-27 19:01:02,737 INFO L125 PetriNetUnfolderBase]: For 265723/265725 co-relation queries the response was YES. [2024-06-27 19:01:02,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61471 conditions, 10472 events. 6645/10472 cut-off events. For 265723/265725 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 67966 event pairs, 1623 based on Foata normal form. 2/10472 useless extension candidates. Maximal degree in co-relation 61352. Up to 9452 conditions per place. [2024-06-27 19:01:02,865 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 317 selfloop transitions, 43 changer transitions 0/367 dead transitions. [2024-06-27 19:01:02,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 367 transitions, 5507 flow [2024-06-27 19:01:02,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:02,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:01:02,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227963525835866 [2024-06-27 19:01:02,867 INFO L175 Difference]: Start difference. First operand has 248 places, 327 transitions, 4683 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:01:02,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 367 transitions, 5507 flow [2024-06-27 19:01:03,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 367 transitions, 5410 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:03,524 INFO L231 Difference]: Finished difference. Result has 250 places, 327 transitions, 4679 flow [2024-06-27 19:01:03,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4586, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4679, PETRI_PLACES=250, PETRI_TRANSITIONS=327} [2024-06-27 19:01:03,525 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 199 predicate places. [2024-06-27 19:01:03,525 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 327 transitions, 4679 flow [2024-06-27 19:01:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:03,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:03,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:03,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:01:03,526 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:03,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash -28058224, now seen corresponding path program 1 times [2024-06-27 19:01:03,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:03,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15135471] [2024-06-27 19:01:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:03,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:06,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:06,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15135471] [2024-06-27 19:01:06,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15135471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:06,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:06,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:06,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668358514] [2024-06-27 19:01:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:06,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:06,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:06,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 327 transitions, 4679 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:06,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:06,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:06,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:09,058 INFO L124 PetriNetUnfolderBase]: 6694/10331 cut-off events. [2024-06-27 19:01:09,058 INFO L125 PetriNetUnfolderBase]: For 268525/268533 co-relation queries the response was YES. [2024-06-27 19:01:09,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61901 conditions, 10331 events. 6694/10331 cut-off events. For 268525/268533 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 65135 event pairs, 1203 based on Foata normal form. 9/10338 useless extension candidates. Maximal degree in co-relation 61781. Up to 9164 conditions per place. [2024-06-27 19:01:09,209 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 311 selfloop transitions, 90 changer transitions 0/408 dead transitions. [2024-06-27 19:01:09,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 408 transitions, 5979 flow [2024-06-27 19:01:09,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:09,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 19:01:09,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5437352245862884 [2024-06-27 19:01:09,210 INFO L175 Difference]: Start difference. First operand has 250 places, 327 transitions, 4679 flow. Second operand 9 states and 230 transitions. [2024-06-27 19:01:09,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 408 transitions, 5979 flow [2024-06-27 19:01:10,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 408 transitions, 5850 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:01:10,039 INFO L231 Difference]: Finished difference. Result has 252 places, 333 transitions, 4863 flow [2024-06-27 19:01:10,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4550, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4863, PETRI_PLACES=252, PETRI_TRANSITIONS=333} [2024-06-27 19:01:10,040 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 201 predicate places. [2024-06-27 19:01:10,040 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 333 transitions, 4863 flow [2024-06-27 19:01:10,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:10,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:10,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:10,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:01:10,041 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:10,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash -974850842, now seen corresponding path program 1 times [2024-06-27 19:01:10,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:10,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583805642] [2024-06-27 19:01:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:10,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:12,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:12,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583805642] [2024-06-27 19:01:12,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583805642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:12,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:12,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:01:12,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571822899] [2024-06-27 19:01:12,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:12,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:01:12,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:01:12,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:01:12,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:12,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 333 transitions, 4863 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:12,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:12,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:12,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:15,336 INFO L124 PetriNetUnfolderBase]: 6769/10395 cut-off events. [2024-06-27 19:01:15,337 INFO L125 PetriNetUnfolderBase]: For 292519/292527 co-relation queries the response was YES. [2024-06-27 19:01:15,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64637 conditions, 10395 events. 6769/10395 cut-off events. For 292519/292527 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 65313 event pairs, 1186 based on Foata normal form. 9/10399 useless extension candidates. Maximal degree in co-relation 64515. Up to 9240 conditions per place. [2024-06-27 19:01:15,464 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 296 selfloop transitions, 90 changer transitions 0/393 dead transitions. [2024-06-27 19:01:15,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 393 transitions, 6216 flow [2024-06-27 19:01:15,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:01:15,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:01:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:01:15,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440729483282675 [2024-06-27 19:01:15,466 INFO L175 Difference]: Start difference. First operand has 252 places, 333 transitions, 4863 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:01:15,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 393 transitions, 6216 flow [2024-06-27 19:01:16,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 393 transitions, 6078 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:16,317 INFO L231 Difference]: Finished difference. Result has 254 places, 342 transitions, 5066 flow [2024-06-27 19:01:16,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5066, PETRI_PLACES=254, PETRI_TRANSITIONS=342} [2024-06-27 19:01:16,318 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 203 predicate places. [2024-06-27 19:01:16,318 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 342 transitions, 5066 flow [2024-06-27 19:01:16,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:16,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:16,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:16,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:01:16,319 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:16,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:16,319 INFO L85 PathProgramCache]: Analyzing trace with hash -23589574, now seen corresponding path program 2 times [2024-06-27 19:01:16,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:16,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626373589] [2024-06-27 19:01:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:16,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:19,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:19,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626373589] [2024-06-27 19:01:19,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626373589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:19,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:19,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:19,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334729759] [2024-06-27 19:01:19,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:19,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:19,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:19,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:19,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 342 transitions, 5066 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:19,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:19,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:19,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:22,449 INFO L124 PetriNetUnfolderBase]: 6818/10459 cut-off events. [2024-06-27 19:01:22,449 INFO L125 PetriNetUnfolderBase]: For 303889/303891 co-relation queries the response was YES. [2024-06-27 19:01:22,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65726 conditions, 10459 events. 6818/10459 cut-off events. For 303889/303891 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 65595 event pairs, 1254 based on Foata normal form. 1/10454 useless extension candidates. Maximal degree in co-relation 65602. Up to 8514 conditions per place. [2024-06-27 19:01:22,569 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 246 selfloop transitions, 158 changer transitions 0/411 dead transitions. [2024-06-27 19:01:22,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 411 transitions, 6526 flow [2024-06-27 19:01:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:22,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:01:22,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550531914893617 [2024-06-27 19:01:22,571 INFO L175 Difference]: Start difference. First operand has 254 places, 342 transitions, 5066 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:01:22,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 411 transitions, 6526 flow [2024-06-27 19:01:23,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 411 transitions, 6375 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:23,203 INFO L231 Difference]: Finished difference. Result has 261 places, 351 transitions, 5534 flow [2024-06-27 19:01:23,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=4915, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5534, PETRI_PLACES=261, PETRI_TRANSITIONS=351} [2024-06-27 19:01:23,205 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 210 predicate places. [2024-06-27 19:01:23,205 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 351 transitions, 5534 flow [2024-06-27 19:01:23,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:23,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:23,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:23,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:01:23,206 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:23,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:23,206 INFO L85 PathProgramCache]: Analyzing trace with hash -23290858, now seen corresponding path program 2 times [2024-06-27 19:01:23,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:23,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755442951] [2024-06-27 19:01:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:23,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:26,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:26,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755442951] [2024-06-27 19:01:26,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755442951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:26,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:26,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:26,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041017363] [2024-06-27 19:01:26,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:26,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:26,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:26,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:26,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:26,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:26,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 351 transitions, 5534 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:26,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:26,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:26,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:29,517 INFO L124 PetriNetUnfolderBase]: 6841/10502 cut-off events. [2024-06-27 19:01:29,517 INFO L125 PetriNetUnfolderBase]: For 324671/324679 co-relation queries the response was YES. [2024-06-27 19:01:29,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68826 conditions, 10502 events. 6841/10502 cut-off events. For 324671/324679 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 65935 event pairs, 1188 based on Foata normal form. 9/10506 useless extension candidates. Maximal degree in co-relation 68699. Up to 9330 conditions per place. [2024-06-27 19:01:29,640 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 309 selfloop transitions, 95 changer transitions 0/411 dead transitions. [2024-06-27 19:01:29,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 411 transitions, 6739 flow [2024-06-27 19:01:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:01:29,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 19:01:29,641 INFO L175 Difference]: Start difference. First operand has 261 places, 351 transitions, 5534 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:01:29,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 411 transitions, 6739 flow [2024-06-27 19:01:30,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 411 transitions, 6582 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 19:01:30,533 INFO L231 Difference]: Finished difference. Result has 266 places, 354 transitions, 5624 flow [2024-06-27 19:01:30,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5377, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5624, PETRI_PLACES=266, PETRI_TRANSITIONS=354} [2024-06-27 19:01:30,534 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 215 predicate places. [2024-06-27 19:01:30,534 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 354 transitions, 5624 flow [2024-06-27 19:01:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:30,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:30,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:30,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:01:30,534 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:30,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:30,535 INFO L85 PathProgramCache]: Analyzing trace with hash -2064989934, now seen corresponding path program 3 times [2024-06-27 19:01:30,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:30,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909381891] [2024-06-27 19:01:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:30,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:33,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:33,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909381891] [2024-06-27 19:01:33,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909381891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:33,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:33,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:33,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954439504] [2024-06-27 19:01:33,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:33,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:33,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:33,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:33,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:33,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:33,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 354 transitions, 5624 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:33,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:33,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:33,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:36,066 INFO L124 PetriNetUnfolderBase]: 6864/10537 cut-off events. [2024-06-27 19:01:36,067 INFO L125 PetriNetUnfolderBase]: For 328162/328164 co-relation queries the response was YES. [2024-06-27 19:01:36,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68198 conditions, 10537 events. 6864/10537 cut-off events. For 328162/328164 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 66163 event pairs, 1259 based on Foata normal form. 1/10532 useless extension candidates. Maximal degree in co-relation 68069. Up to 8546 conditions per place. [2024-06-27 19:01:36,221 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 243 selfloop transitions, 163 changer transitions 0/413 dead transitions. [2024-06-27 19:01:36,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 413 transitions, 6976 flow [2024-06-27 19:01:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:01:36,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:01:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:01:36,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 19:01:36,223 INFO L175 Difference]: Start difference. First operand has 266 places, 354 transitions, 5624 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:01:36,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 413 transitions, 6976 flow [2024-06-27 19:01:37,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 413 transitions, 6766 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:37,170 INFO L231 Difference]: Finished difference. Result has 268 places, 357 transitions, 5798 flow [2024-06-27 19:01:37,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=268, PETRI_TRANSITIONS=357} [2024-06-27 19:01:37,171 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 217 predicate places. [2024-06-27 19:01:37,171 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 357 transitions, 5798 flow [2024-06-27 19:01:37,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:37,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:37,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:37,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:01:37,172 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:37,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:37,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2064989562, now seen corresponding path program 1 times [2024-06-27 19:01:37,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:37,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664866124] [2024-06-27 19:01:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:37,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:39,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:39,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664866124] [2024-06-27 19:01:39,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664866124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:39,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:39,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:39,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209350948] [2024-06-27 19:01:39,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:39,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:39,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:39,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:39,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:39,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 357 transitions, 5798 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:39,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:39,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:39,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:42,948 INFO L124 PetriNetUnfolderBase]: 7066/10829 cut-off events. [2024-06-27 19:01:42,948 INFO L125 PetriNetUnfolderBase]: For 355874/355882 co-relation queries the response was YES. [2024-06-27 19:01:43,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71253 conditions, 10829 events. 7066/10829 cut-off events. For 355874/355882 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 67985 event pairs, 1209 based on Foata normal form. 10/10834 useless extension candidates. Maximal degree in co-relation 71123. Up to 9281 conditions per place. [2024-06-27 19:01:43,099 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 329 selfloop transitions, 113 changer transitions 0/449 dead transitions. [2024-06-27 19:01:43,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 449 transitions, 7580 flow [2024-06-27 19:01:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:01:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:01:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 248 transitions. [2024-06-27 19:01:43,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276595744680851 [2024-06-27 19:01:43,101 INFO L175 Difference]: Start difference. First operand has 268 places, 357 transitions, 5798 flow. Second operand 10 states and 248 transitions. [2024-06-27 19:01:43,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 449 transitions, 7580 flow [2024-06-27 19:01:44,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 449 transitions, 7275 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:44,263 INFO L231 Difference]: Finished difference. Result has 275 places, 375 transitions, 6036 flow [2024-06-27 19:01:44,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5493, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6036, PETRI_PLACES=275, PETRI_TRANSITIONS=375} [2024-06-27 19:01:44,263 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 224 predicate places. [2024-06-27 19:01:44,263 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 375 transitions, 6036 flow [2024-06-27 19:01:44,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:44,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:44,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:44,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:01:44,264 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:44,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:44,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1887620892, now seen corresponding path program 2 times [2024-06-27 19:01:44,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:44,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909432311] [2024-06-27 19:01:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:44,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:47,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:47,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909432311] [2024-06-27 19:01:47,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909432311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:47,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:47,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:47,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737454642] [2024-06-27 19:01:47,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:47,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:47,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:47,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:47,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:47,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:47,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 375 transitions, 6036 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:47,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:47,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:47,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:50,356 INFO L124 PetriNetUnfolderBase]: 7396/11350 cut-off events. [2024-06-27 19:01:50,357 INFO L125 PetriNetUnfolderBase]: For 409409/409411 co-relation queries the response was YES. [2024-06-27 19:01:50,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77723 conditions, 11350 events. 7396/11350 cut-off events. For 409409/409411 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 71579 event pairs, 1248 based on Foata normal form. 4/11352 useless extension candidates. Maximal degree in co-relation 77590. Up to 9828 conditions per place. [2024-06-27 19:01:50,511 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 387 selfloop transitions, 97 changer transitions 0/491 dead transitions. [2024-06-27 19:01:50,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 491 transitions, 8391 flow [2024-06-27 19:01:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:01:50,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:01:50,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-27 19:01:50,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164410058027079 [2024-06-27 19:01:50,513 INFO L175 Difference]: Start difference. First operand has 275 places, 375 transitions, 6036 flow. Second operand 11 states and 267 transitions. [2024-06-27 19:01:50,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 491 transitions, 8391 flow [2024-06-27 19:01:51,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 491 transitions, 8080 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-27 19:01:51,851 INFO L231 Difference]: Finished difference. Result has 283 places, 410 transitions, 6744 flow [2024-06-27 19:01:51,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=5806, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6744, PETRI_PLACES=283, PETRI_TRANSITIONS=410} [2024-06-27 19:01:51,852 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 232 predicate places. [2024-06-27 19:01:51,852 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 410 transitions, 6744 flow [2024-06-27 19:01:51,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:51,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:51,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:51,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:01:51,853 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:51,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash 153840476, now seen corresponding path program 4 times [2024-06-27 19:01:51,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:51,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779848320] [2024-06-27 19:01:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:01:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:01:54,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:01:54,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779848320] [2024-06-27 19:01:54,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779848320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:01:54,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:01:54,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:01:54,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203034292] [2024-06-27 19:01:54,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:01:54,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:01:54,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:01:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:01:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:01:54,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:01:54,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 410 transitions, 6744 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:54,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:01:54,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:01:54,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:01:57,694 INFO L124 PetriNetUnfolderBase]: 7445/11436 cut-off events. [2024-06-27 19:01:57,694 INFO L125 PetriNetUnfolderBase]: For 429426/429428 co-relation queries the response was YES. [2024-06-27 19:01:57,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80677 conditions, 11436 events. 7445/11436 cut-off events. For 429426/429428 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 72363 event pairs, 1265 based on Foata normal form. 1/11435 useless extension candidates. Maximal degree in co-relation 80540. Up to 10299 conditions per place. [2024-06-27 19:01:57,842 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 384 selfloop transitions, 85 changer transitions 0/476 dead transitions. [2024-06-27 19:01:57,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 476 transitions, 8240 flow [2024-06-27 19:01:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:01:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:01:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:01:57,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508274231678487 [2024-06-27 19:01:57,844 INFO L175 Difference]: Start difference. First operand has 283 places, 410 transitions, 6744 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:01:57,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 476 transitions, 8240 flow [2024-06-27 19:01:59,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 476 transitions, 8003 flow, removed 79 selfloop flow, removed 6 redundant places. [2024-06-27 19:01:59,492 INFO L231 Difference]: Finished difference. Result has 287 places, 416 transitions, 6833 flow [2024-06-27 19:01:59,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6833, PETRI_PLACES=287, PETRI_TRANSITIONS=416} [2024-06-27 19:01:59,493 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 236 predicate places. [2024-06-27 19:01:59,493 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 416 transitions, 6833 flow [2024-06-27 19:01:59,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:01:59,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:01:59,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:01:59,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:01:59,493 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:01:59,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:01:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1110702692, now seen corresponding path program 3 times [2024-06-27 19:01:59,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:01:59,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888970559] [2024-06-27 19:01:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:01:59,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:01:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:01,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888970559] [2024-06-27 19:02:01,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888970559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:01,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:01,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:01,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071910811] [2024-06-27 19:02:01,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:01,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:01,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:01,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:01,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:01,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:01,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 416 transitions, 6833 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:01,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:01,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:01,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:04,920 INFO L124 PetriNetUnfolderBase]: 7442/11432 cut-off events. [2024-06-27 19:02:04,920 INFO L125 PetriNetUnfolderBase]: For 432472/432474 co-relation queries the response was YES. [2024-06-27 19:02:05,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80425 conditions, 11432 events. 7442/11432 cut-off events. For 432472/432474 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 72361 event pairs, 1264 based on Foata normal form. 1/11431 useless extension candidates. Maximal degree in co-relation 80285. Up to 10340 conditions per place. [2024-06-27 19:02:05,068 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 379 selfloop transitions, 81 changer transitions 0/467 dead transitions. [2024-06-27 19:02:05,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 467 transitions, 7989 flow [2024-06-27 19:02:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-27 19:02:05,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132978723404256 [2024-06-27 19:02:05,070 INFO L175 Difference]: Start difference. First operand has 287 places, 416 transitions, 6833 flow. Second operand 8 states and 193 transitions. [2024-06-27 19:02:05,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 467 transitions, 7989 flow [2024-06-27 19:02:06,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 467 transitions, 7757 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 19:02:06,528 INFO L231 Difference]: Finished difference. Result has 289 places, 416 transitions, 6798 flow [2024-06-27 19:02:06,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6613, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6798, PETRI_PLACES=289, PETRI_TRANSITIONS=416} [2024-06-27 19:02:06,529 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 238 predicate places. [2024-06-27 19:02:06,529 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 416 transitions, 6798 flow [2024-06-27 19:02:06,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:06,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:06,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:06,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:02:06,530 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:06,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1887858042, now seen corresponding path program 3 times [2024-06-27 19:02:06,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:06,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922864510] [2024-06-27 19:02:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:06,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:09,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:09,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:09,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922864510] [2024-06-27 19:02:09,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922864510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:09,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:09,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:09,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122217742] [2024-06-27 19:02:09,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:09,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:09,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:09,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 416 transitions, 6798 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:09,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:09,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:09,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:12,918 INFO L124 PetriNetUnfolderBase]: 7430/11428 cut-off events. [2024-06-27 19:02:12,918 INFO L125 PetriNetUnfolderBase]: For 436496/436498 co-relation queries the response was YES. [2024-06-27 19:02:13,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79985 conditions, 11428 events. 7430/11428 cut-off events. For 436496/436498 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 72379 event pairs, 1239 based on Foata normal form. 4/11430 useless extension candidates. Maximal degree in co-relation 79844. Up to 9886 conditions per place. [2024-06-27 19:02:13,062 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 391 selfloop transitions, 103 changer transitions 0/501 dead transitions. [2024-06-27 19:02:13,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 501 transitions, 8427 flow [2024-06-27 19:02:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:02:13,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:02:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-27 19:02:13,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164410058027079 [2024-06-27 19:02:13,064 INFO L175 Difference]: Start difference. First operand has 289 places, 416 transitions, 6798 flow. Second operand 11 states and 267 transitions. [2024-06-27 19:02:13,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 501 transitions, 8427 flow [2024-06-27 19:02:14,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 501 transitions, 8247 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:14,507 INFO L231 Difference]: Finished difference. Result has 294 places, 425 transitions, 7086 flow [2024-06-27 19:02:14,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6624, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7086, PETRI_PLACES=294, PETRI_TRANSITIONS=425} [2024-06-27 19:02:14,509 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 243 predicate places. [2024-06-27 19:02:14,509 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 425 transitions, 7086 flow [2024-06-27 19:02:14,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:14,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:14,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:14,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:02:14,510 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:14,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:14,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1887611964, now seen corresponding path program 1 times [2024-06-27 19:02:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:14,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752890076] [2024-06-27 19:02:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:14,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:17,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:17,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752890076] [2024-06-27 19:02:17,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752890076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:17,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:17,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:02:17,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345147158] [2024-06-27 19:02:17,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:17,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:02:17,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:17,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:02:17,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:02:17,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 47 [2024-06-27 19:02:17,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 425 transitions, 7086 flow. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:17,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:17,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 47 [2024-06-27 19:02:17,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:21,078 INFO L124 PetriNetUnfolderBase]: 7242/11192 cut-off events. [2024-06-27 19:02:21,079 INFO L125 PetriNetUnfolderBase]: For 471513/471592 co-relation queries the response was YES. [2024-06-27 19:02:21,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79568 conditions, 11192 events. 7242/11192 cut-off events. For 471513/471592 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 71686 event pairs, 1186 based on Foata normal form. 62/11184 useless extension candidates. Maximal degree in co-relation 79425. Up to 9579 conditions per place. [2024-06-27 19:02:21,229 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 384 selfloop transitions, 64 changer transitions 0/488 dead transitions. [2024-06-27 19:02:21,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 488 transitions, 8262 flow [2024-06-27 19:02:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:02:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:02:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-27 19:02:21,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271867612293144 [2024-06-27 19:02:21,231 INFO L175 Difference]: Start difference. First operand has 294 places, 425 transitions, 7086 flow. Second operand 9 states and 223 transitions. [2024-06-27 19:02:21,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 488 transitions, 8262 flow [2024-06-27 19:02:22,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 488 transitions, 7988 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:22,483 INFO L231 Difference]: Finished difference. Result has 296 places, 427 transitions, 6997 flow [2024-06-27 19:02:22,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6812, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6997, PETRI_PLACES=296, PETRI_TRANSITIONS=427} [2024-06-27 19:02:22,484 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 245 predicate places. [2024-06-27 19:02:22,484 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 427 transitions, 6997 flow [2024-06-27 19:02:22,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:22,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:22,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:22,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:02:22,484 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:22,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1635902036, now seen corresponding path program 4 times [2024-06-27 19:02:22,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:22,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858324503] [2024-06-27 19:02:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:24,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:24,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858324503] [2024-06-27 19:02:24,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858324503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:24,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:24,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:24,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078688627] [2024-06-27 19:02:24,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:24,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:24,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:24,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:24,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:24,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:24,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 427 transitions, 6997 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:24,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:24,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:24,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:27,818 INFO L124 PetriNetUnfolderBase]: 7665/11750 cut-off events. [2024-06-27 19:02:27,819 INFO L125 PetriNetUnfolderBase]: For 468798/468831 co-relation queries the response was YES. [2024-06-27 19:02:27,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82718 conditions, 11750 events. 7665/11750 cut-off events. For 468798/468831 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 74628 event pairs, 1335 based on Foata normal form. 27/11770 useless extension candidates. Maximal degree in co-relation 82574. Up to 10454 conditions per place. [2024-06-27 19:02:28,000 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 376 selfloop transitions, 98 changer transitions 0/481 dead transitions. [2024-06-27 19:02:28,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 481 transitions, 8557 flow [2024-06-27 19:02:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 19:02:28,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288753799392097 [2024-06-27 19:02:28,002 INFO L175 Difference]: Start difference. First operand has 296 places, 427 transitions, 6997 flow. Second operand 7 states and 174 transitions. [2024-06-27 19:02:28,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 481 transitions, 8557 flow [2024-06-27 19:02:29,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 481 transitions, 8384 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:29,637 INFO L231 Difference]: Finished difference. Result has 296 places, 430 transitions, 7091 flow [2024-06-27 19:02:29,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6826, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7091, PETRI_PLACES=296, PETRI_TRANSITIONS=430} [2024-06-27 19:02:29,638 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 245 predicate places. [2024-06-27 19:02:29,638 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 430 transitions, 7091 flow [2024-06-27 19:02:29,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:29,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:29,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:29,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:02:29,639 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:29,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:29,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1785046992, now seen corresponding path program 5 times [2024-06-27 19:02:29,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:29,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863154151] [2024-06-27 19:02:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:29,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:31,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:31,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863154151] [2024-06-27 19:02:31,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863154151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:31,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:31,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:02:31,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464512011] [2024-06-27 19:02:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:31,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:02:31,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:02:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:02:31,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:31,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 430 transitions, 7091 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:31,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:31,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:31,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:35,180 INFO L124 PetriNetUnfolderBase]: 7693/11792 cut-off events. [2024-06-27 19:02:35,180 INFO L125 PetriNetUnfolderBase]: For 475490/475523 co-relation queries the response was YES. [2024-06-27 19:02:35,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82822 conditions, 11792 events. 7693/11792 cut-off events. For 475490/475523 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 74931 event pairs, 1335 based on Foata normal form. 27/11812 useless extension candidates. Maximal degree in co-relation 82677. Up to 10482 conditions per place. [2024-06-27 19:02:35,351 INFO L140 encePairwiseOnDemand]: 38/47 looper letters, 374 selfloop transitions, 101 changer transitions 0/482 dead transitions. [2024-06-27 19:02:35,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 482 transitions, 8577 flow [2024-06-27 19:02:35,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:02:35,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:02:35,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-27 19:02:35,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.513677811550152 [2024-06-27 19:02:35,353 INFO L175 Difference]: Start difference. First operand has 296 places, 430 transitions, 7091 flow. Second operand 7 states and 169 transitions. [2024-06-27 19:02:35,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 482 transitions, 8577 flow [2024-06-27 19:02:37,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 482 transitions, 8171 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 19:02:37,012 INFO L231 Difference]: Finished difference. Result has 297 places, 436 transitions, 7049 flow [2024-06-27 19:02:37,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6717, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7049, PETRI_PLACES=297, PETRI_TRANSITIONS=436} [2024-06-27 19:02:37,012 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 246 predicate places. [2024-06-27 19:02:37,013 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 436 transitions, 7049 flow [2024-06-27 19:02:37,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:37,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:37,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:37,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:02:37,013 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:37,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash 418019132, now seen corresponding path program 5 times [2024-06-27 19:02:37,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:37,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117271763] [2024-06-27 19:02:37,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:37,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:39,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117271763] [2024-06-27 19:02:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117271763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:39,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:39,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:39,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837728103] [2024-06-27 19:02:39,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:39,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:39,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:39,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:39,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:39,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:39,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 436 transitions, 7049 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:39,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:39,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:39,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:42,722 INFO L124 PetriNetUnfolderBase]: 7716/11734 cut-off events. [2024-06-27 19:02:42,723 INFO L125 PetriNetUnfolderBase]: For 480116/480124 co-relation queries the response was YES. [2024-06-27 19:02:42,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82746 conditions, 11734 events. 7716/11734 cut-off events. For 480116/480124 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 73556 event pairs, 1491 based on Foata normal form. 3/11717 useless extension candidates. Maximal degree in co-relation 82602. Up to 9633 conditions per place. [2024-06-27 19:02:42,885 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 292 selfloop transitions, 201 changer transitions 0/500 dead transitions. [2024-06-27 19:02:42,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 500 transitions, 8925 flow [2024-06-27 19:02:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:42,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:02:42,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 19:02:42,887 INFO L175 Difference]: Start difference. First operand has 297 places, 436 transitions, 7049 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:02:42,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 500 transitions, 8925 flow [2024-06-27 19:02:44,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 500 transitions, 8766 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 19:02:44,682 INFO L231 Difference]: Finished difference. Result has 302 places, 442 transitions, 7464 flow [2024-06-27 19:02:44,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=6890, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7464, PETRI_PLACES=302, PETRI_TRANSITIONS=442} [2024-06-27 19:02:44,683 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 251 predicate places. [2024-06-27 19:02:44,683 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 442 transitions, 7464 flow [2024-06-27 19:02:44,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:44,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:44,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:44,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:02:44,684 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:44,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1469249766, now seen corresponding path program 6 times [2024-06-27 19:02:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:44,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707828930] [2024-06-27 19:02:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:44,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:47,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:47,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707828930] [2024-06-27 19:02:47,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707828930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:47,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:47,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:47,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369772844] [2024-06-27 19:02:47,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:47,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:47,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:47,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:47,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:47,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 442 transitions, 7464 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:47,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:47,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:47,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:50,858 INFO L124 PetriNetUnfolderBase]: 7739/11846 cut-off events. [2024-06-27 19:02:50,859 INFO L125 PetriNetUnfolderBase]: For 495911/495927 co-relation queries the response was YES. [2024-06-27 19:02:50,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84301 conditions, 11846 events. 7739/11846 cut-off events. For 495911/495927 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 75110 event pairs, 1390 based on Foata normal form. 15/11852 useless extension candidates. Maximal degree in co-relation 84156. Up to 10537 conditions per place. [2024-06-27 19:02:51,032 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 380 selfloop transitions, 115 changer transitions 0/502 dead transitions. [2024-06-27 19:02:51,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 502 transitions, 8979 flow [2024-06-27 19:02:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:02:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:02:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:02:51,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:02:51,033 INFO L175 Difference]: Start difference. First operand has 302 places, 442 transitions, 7464 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:02:51,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 502 transitions, 8979 flow [2024-06-27 19:02:52,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 502 transitions, 8694 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 19:02:52,496 INFO L231 Difference]: Finished difference. Result has 305 places, 445 transitions, 7477 flow [2024-06-27 19:02:52,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7182, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7477, PETRI_PLACES=305, PETRI_TRANSITIONS=445} [2024-06-27 19:02:52,497 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 254 predicate places. [2024-06-27 19:02:52,497 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 445 transitions, 7477 flow [2024-06-27 19:02:52,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:52,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:02:52,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:02:52,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:02:52,498 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:02:52,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:02:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1598591792, now seen corresponding path program 4 times [2024-06-27 19:02:52,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:02:52,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425815028] [2024-06-27 19:02:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:02:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:02:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:02:55,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:02:55,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:02:55,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425815028] [2024-06-27 19:02:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425815028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:02:55,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:02:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:02:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36224165] [2024-06-27 19:02:55,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:02:55,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:02:55,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:02:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:02:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:02:55,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:02:55,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 445 transitions, 7477 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:02:55,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:02:55,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:02:55,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:02:58,326 INFO L124 PetriNetUnfolderBase]: 7785/11899 cut-off events. [2024-06-27 19:02:58,326 INFO L125 PetriNetUnfolderBase]: For 504673/504689 co-relation queries the response was YES. [2024-06-27 19:02:58,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84221 conditions, 11899 events. 7785/11899 cut-off events. For 504673/504689 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 75297 event pairs, 1374 based on Foata normal form. 16/11906 useless extension candidates. Maximal degree in co-relation 84075. Up to 10532 conditions per place. [2024-06-27 19:02:58,490 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 388 selfloop transitions, 123 changer transitions 0/518 dead transitions. [2024-06-27 19:02:58,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 518 transitions, 9272 flow [2024-06-27 19:02:58,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:02:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:02:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-27 19:02:58,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153664302600472 [2024-06-27 19:02:58,492 INFO L175 Difference]: Start difference. First operand has 305 places, 445 transitions, 7477 flow. Second operand 9 states and 218 transitions. [2024-06-27 19:02:58,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 518 transitions, 9272 flow [2024-06-27 19:03:00,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 518 transitions, 9109 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:00,010 INFO L231 Difference]: Finished difference. Result has 309 places, 453 transitions, 7753 flow [2024-06-27 19:03:00,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7314, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7753, PETRI_PLACES=309, PETRI_TRANSITIONS=453} [2024-06-27 19:03:00,011 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 258 predicate places. [2024-06-27 19:03:00,011 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 453 transitions, 7753 flow [2024-06-27 19:03:00,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:00,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:00,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:00,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:03:00,012 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:00,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:00,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1598592164, now seen corresponding path program 6 times [2024-06-27 19:03:00,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:00,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571906449] [2024-06-27 19:03:00,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:00,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:02,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:02,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571906449] [2024-06-27 19:03:02,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571906449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:02,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529544983] [2024-06-27 19:03:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:02,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:02,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:02,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:02,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:02,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:02,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 453 transitions, 7753 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:02,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:02,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:02,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:06,570 INFO L124 PetriNetUnfolderBase]: 7808/11871 cut-off events. [2024-06-27 19:03:06,570 INFO L125 PetriNetUnfolderBase]: For 525413/525421 co-relation queries the response was YES. [2024-06-27 19:03:06,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85002 conditions, 11871 events. 7808/11871 cut-off events. For 525413/525421 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 74454 event pairs, 1496 based on Foata normal form. 3/11854 useless extension candidates. Maximal degree in co-relation 84854. Up to 9727 conditions per place. [2024-06-27 19:03:06,752 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 299 selfloop transitions, 204 changer transitions 0/510 dead transitions. [2024-06-27 19:03:06,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 510 transitions, 9555 flow [2024-06-27 19:03:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:06,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:06,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:03:06,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:03:06,754 INFO L175 Difference]: Start difference. First operand has 309 places, 453 transitions, 7753 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:03:06,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 510 transitions, 9555 flow [2024-06-27 19:03:08,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 510 transitions, 9311 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:08,738 INFO L231 Difference]: Finished difference. Result has 312 places, 456 transitions, 7987 flow [2024-06-27 19:03:08,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7987, PETRI_PLACES=312, PETRI_TRANSITIONS=456} [2024-06-27 19:03:08,738 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 261 predicate places. [2024-06-27 19:03:08,739 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 456 transitions, 7987 flow [2024-06-27 19:03:08,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:08,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:08,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:08,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:03:08,739 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:08,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:08,740 INFO L85 PathProgramCache]: Analyzing trace with hash -268149958, now seen corresponding path program 5 times [2024-06-27 19:03:08,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:08,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851226684] [2024-06-27 19:03:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:11,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:11,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851226684] [2024-06-27 19:03:11,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851226684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:11,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:11,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:11,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144397012] [2024-06-27 19:03:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:11,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:11,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:11,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:11,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 456 transitions, 7987 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:11,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:11,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:11,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:14,911 INFO L124 PetriNetUnfolderBase]: 7926/12111 cut-off events. [2024-06-27 19:03:14,912 INFO L125 PetriNetUnfolderBase]: For 544995/545011 co-relation queries the response was YES. [2024-06-27 19:03:15,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87653 conditions, 12111 events. 7926/12111 cut-off events. For 544995/545011 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 76754 event pairs, 1467 based on Foata normal form. 16/12118 useless extension candidates. Maximal degree in co-relation 87503. Up to 9647 conditions per place. [2024-06-27 19:03:15,085 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 380 selfloop transitions, 150 changer transitions 0/537 dead transitions. [2024-06-27 19:03:15,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 537 transitions, 10203 flow [2024-06-27 19:03:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:15,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:03:15,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292553191489362 [2024-06-27 19:03:15,086 INFO L175 Difference]: Start difference. First operand has 312 places, 456 transitions, 7987 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:03:15,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 537 transitions, 10203 flow [2024-06-27 19:03:16,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 537 transitions, 9930 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:03:16,707 INFO L231 Difference]: Finished difference. Result has 318 places, 476 transitions, 8526 flow [2024-06-27 19:03:16,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=7714, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8526, PETRI_PLACES=318, PETRI_TRANSITIONS=476} [2024-06-27 19:03:16,708 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 267 predicate places. [2024-06-27 19:03:16,708 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 476 transitions, 8526 flow [2024-06-27 19:03:16,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:16,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:16,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:16,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:03:16,708 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:16,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:16,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1244329124, now seen corresponding path program 7 times [2024-06-27 19:03:16,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:16,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547800780] [2024-06-27 19:03:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:19,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:19,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547800780] [2024-06-27 19:03:19,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547800780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:19,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:19,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:19,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26634877] [2024-06-27 19:03:19,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:19,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:19,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:19,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:19,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:19,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:19,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 476 transitions, 8526 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:19,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:19,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:19,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:23,119 INFO L124 PetriNetUnfolderBase]: 7949/12079 cut-off events. [2024-06-27 19:03:23,120 INFO L125 PetriNetUnfolderBase]: For 575084/575092 co-relation queries the response was YES. [2024-06-27 19:03:23,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90189 conditions, 12079 events. 7949/12079 cut-off events. For 575084/575092 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 75892 event pairs, 1507 based on Foata normal form. 3/12062 useless extension candidates. Maximal degree in co-relation 90035. Up to 9903 conditions per place. [2024-06-27 19:03:23,291 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 312 selfloop transitions, 209 changer transitions 0/528 dead transitions. [2024-06-27 19:03:23,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 528 transitions, 10216 flow [2024-06-27 19:03:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-27 19:03:23,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159574468085106 [2024-06-27 19:03:23,292 INFO L175 Difference]: Start difference. First operand has 318 places, 476 transitions, 8526 flow. Second operand 8 states and 194 transitions. [2024-06-27 19:03:23,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 528 transitions, 10216 flow [2024-06-27 19:03:24,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 528 transitions, 10115 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-27 19:03:24,999 INFO L231 Difference]: Finished difference. Result has 324 places, 479 transitions, 8917 flow [2024-06-27 19:03:24,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8425, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8917, PETRI_PLACES=324, PETRI_TRANSITIONS=479} [2024-06-27 19:03:25,000 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 273 predicate places. [2024-06-27 19:03:25,000 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 479 transitions, 8917 flow [2024-06-27 19:03:25,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:25,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:25,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:25,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:03:25,000 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:25,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:25,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1244328752, now seen corresponding path program 6 times [2024-06-27 19:03:25,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:25,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945612486] [2024-06-27 19:03:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:25,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:25,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:27,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:27,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945612486] [2024-06-27 19:03:27,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945612486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:27,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694545535] [2024-06-27 19:03:27,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:27,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:27,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:27,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:27,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 479 transitions, 8917 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:27,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:27,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:27,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:31,251 INFO L124 PetriNetUnfolderBase]: 7943/12142 cut-off events. [2024-06-27 19:03:31,251 INFO L125 PetriNetUnfolderBase]: For 575262/575278 co-relation queries the response was YES. [2024-06-27 19:03:31,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90722 conditions, 12142 events. 7943/12142 cut-off events. For 575262/575278 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 77020 event pairs, 1394 based on Foata normal form. 16/12149 useless extension candidates. Maximal degree in co-relation 90565. Up to 10785 conditions per place. [2024-06-27 19:03:31,421 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 408 selfloop transitions, 118 changer transitions 0/533 dead transitions. [2024-06-27 19:03:31,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 533 transitions, 10415 flow [2024-06-27 19:03:31,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:03:31,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-27 19:03:31,423 INFO L175 Difference]: Start difference. First operand has 324 places, 479 transitions, 8917 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:03:31,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 533 transitions, 10415 flow [2024-06-27 19:03:33,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 533 transitions, 9979 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 19:03:33,667 INFO L231 Difference]: Finished difference. Result has 327 places, 480 transitions, 8743 flow [2024-06-27 19:03:33,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8481, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8743, PETRI_PLACES=327, PETRI_TRANSITIONS=480} [2024-06-27 19:03:33,680 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 276 predicate places. [2024-06-27 19:03:33,680 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 480 transitions, 8743 flow [2024-06-27 19:03:33,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:33,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:33,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:33,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:03:33,681 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:33,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2105183606, now seen corresponding path program 7 times [2024-06-27 19:03:33,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:33,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215912968] [2024-06-27 19:03:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:33,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:36,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215912968] [2024-06-27 19:03:36,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215912968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:36,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:36,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:36,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782906286] [2024-06-27 19:03:36,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:36,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:36,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:36,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:36,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:36,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:36,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 480 transitions, 8743 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:36,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:36,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:36,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:40,318 INFO L124 PetriNetUnfolderBase]: 7940/12162 cut-off events. [2024-06-27 19:03:40,318 INFO L125 PetriNetUnfolderBase]: For 568077/568093 co-relation queries the response was YES. [2024-06-27 19:03:40,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89718 conditions, 12162 events. 7940/12162 cut-off events. For 568077/568093 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 77413 event pairs, 1368 based on Foata normal form. 15/12168 useless extension candidates. Maximal degree in co-relation 89560. Up to 10810 conditions per place. [2024-06-27 19:03:40,478 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 425 selfloop transitions, 116 changer transitions 0/548 dead transitions. [2024-06-27 19:03:40,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 548 transitions, 10540 flow [2024-06-27 19:03:40,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:03:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:03:40,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-27 19:03:40,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4978723404255319 [2024-06-27 19:03:40,479 INFO L175 Difference]: Start difference. First operand has 327 places, 480 transitions, 8743 flow. Second operand 10 states and 234 transitions. [2024-06-27 19:03:40,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 548 transitions, 10540 flow [2024-06-27 19:03:42,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 548 transitions, 10295 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:03:42,561 INFO L231 Difference]: Finished difference. Result has 331 places, 480 transitions, 8736 flow [2024-06-27 19:03:42,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8498, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8736, PETRI_PLACES=331, PETRI_TRANSITIONS=480} [2024-06-27 19:03:42,561 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 280 predicate places. [2024-06-27 19:03:42,561 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 480 transitions, 8736 flow [2024-06-27 19:03:42,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:42,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:42,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:42,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:03:42,562 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:42,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash 941299678, now seen corresponding path program 8 times [2024-06-27 19:03:42,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:42,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247986680] [2024-06-27 19:03:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:42,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:44,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:44,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247986680] [2024-06-27 19:03:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247986680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:44,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:44,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:44,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878147143] [2024-06-27 19:03:44,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:44,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:44,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:44,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:44,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:44,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 480 transitions, 8736 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:44,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:44,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:44,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:48,728 INFO L124 PetriNetUnfolderBase]: 7937/12141 cut-off events. [2024-06-27 19:03:48,729 INFO L125 PetriNetUnfolderBase]: For 575674/575690 co-relation queries the response was YES. [2024-06-27 19:03:48,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89666 conditions, 12141 events. 7937/12141 cut-off events. For 575674/575690 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 77059 event pairs, 1352 based on Foata normal form. 15/12147 useless extension candidates. Maximal degree in co-relation 89507. Up to 10807 conditions per place. [2024-06-27 19:03:48,947 INFO L140 encePairwiseOnDemand]: 37/47 looper letters, 412 selfloop transitions, 114 changer transitions 0/533 dead transitions. [2024-06-27 19:03:48,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 533 transitions, 10253 flow [2024-06-27 19:03:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:03:48,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079787234042553 [2024-06-27 19:03:48,948 INFO L175 Difference]: Start difference. First operand has 331 places, 480 transitions, 8736 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:03:48,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 533 transitions, 10253 flow [2024-06-27 19:03:51,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 533 transitions, 9940 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 19:03:51,520 INFO L231 Difference]: Finished difference. Result has 331 places, 480 transitions, 8658 flow [2024-06-27 19:03:51,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8423, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8658, PETRI_PLACES=331, PETRI_TRANSITIONS=480} [2024-06-27 19:03:51,520 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 280 predicate places. [2024-06-27 19:03:51,520 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 480 transitions, 8658 flow [2024-06-27 19:03:51,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:51,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:03:51,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:03:51,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:03:51,521 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:03:51,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:03:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1076195966, now seen corresponding path program 7 times [2024-06-27 19:03:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:03:51,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185702416] [2024-06-27 19:03:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:03:51,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:03:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:03:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:03:53,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:03:53,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185702416] [2024-06-27 19:03:53,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185702416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:03:53,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:03:53,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:03:53,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123561994] [2024-06-27 19:03:53,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:03:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:03:53,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:03:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:03:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:03:53,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:03:53,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 480 transitions, 8658 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:03:53,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:03:53,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:03:53,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:03:57,345 INFO L124 PetriNetUnfolderBase]: 8325/12714 cut-off events. [2024-06-27 19:03:57,345 INFO L125 PetriNetUnfolderBase]: For 636428/636436 co-relation queries the response was YES. [2024-06-27 19:03:57,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94787 conditions, 12714 events. 8325/12714 cut-off events. For 636428/636436 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 80856 event pairs, 1329 based on Foata normal form. 4/12710 useless extension candidates. Maximal degree in co-relation 94629. Up to 9798 conditions per place. [2024-06-27 19:03:57,570 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 362 selfloop transitions, 201 changer transitions 0/570 dead transitions. [2024-06-27 19:03:57,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 570 transitions, 11199 flow [2024-06-27 19:03:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:03:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:03:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:03:57,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5558510638297872 [2024-06-27 19:03:57,571 INFO L175 Difference]: Start difference. First operand has 331 places, 480 transitions, 8658 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:03:57,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 570 transitions, 11199 flow [2024-06-27 19:04:00,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 570 transitions, 10971 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:00,195 INFO L231 Difference]: Finished difference. Result has 334 places, 505 transitions, 9496 flow [2024-06-27 19:04:00,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=8430, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9496, PETRI_PLACES=334, PETRI_TRANSITIONS=505} [2024-06-27 19:04:00,195 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 283 predicate places. [2024-06-27 19:04:00,195 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 505 transitions, 9496 flow [2024-06-27 19:04:00,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:00,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:00,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:00,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:04:00,197 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:00,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:00,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1075780070, now seen corresponding path program 9 times [2024-06-27 19:04:00,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:00,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206250518] [2024-06-27 19:04:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:00,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:00,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:02,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:02,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206250518] [2024-06-27 19:04:02,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206250518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:02,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:02,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:04:02,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549818122] [2024-06-27 19:04:02,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:02,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:04:02,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:02,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:04:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:04:02,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:02,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 505 transitions, 9496 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:02,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:02,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:02,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:06,878 INFO L124 PetriNetUnfolderBase]: 8322/12803 cut-off events. [2024-06-27 19:04:06,878 INFO L125 PetriNetUnfolderBase]: For 656838/656840 co-relation queries the response was YES. [2024-06-27 19:04:07,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98266 conditions, 12803 events. 8322/12803 cut-off events. For 656838/656840 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 82490 event pairs, 1361 based on Foata normal form. 1/12802 useless extension candidates. Maximal degree in co-relation 98105. Up to 11122 conditions per place. [2024-06-27 19:04:07,069 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 409 selfloop transitions, 150 changer transitions 0/566 dead transitions. [2024-06-27 19:04:07,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 566 transitions, 11028 flow [2024-06-27 19:04:07,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:04:07,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585106382978723 [2024-06-27 19:04:07,070 INFO L175 Difference]: Start difference. First operand has 334 places, 505 transitions, 9496 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:04:07,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 566 transitions, 11028 flow [2024-06-27 19:04:09,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 566 transitions, 10881 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-27 19:04:09,896 INFO L231 Difference]: Finished difference. Result has 340 places, 505 transitions, 9701 flow [2024-06-27 19:04:09,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9349, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9701, PETRI_PLACES=340, PETRI_TRANSITIONS=505} [2024-06-27 19:04:09,896 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 289 predicate places. [2024-06-27 19:04:09,896 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 505 transitions, 9701 flow [2024-06-27 19:04:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:09,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:09,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:09,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:04:09,897 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash 221662522, now seen corresponding path program 8 times [2024-06-27 19:04:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120163317] [2024-06-27 19:04:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:12,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:12,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120163317] [2024-06-27 19:04:12,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120163317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:12,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:12,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:12,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817357695] [2024-06-27 19:04:12,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:12,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:12,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:12,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:12,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:12,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:12,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 505 transitions, 9701 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:12,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:12,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:12,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:16,364 INFO L124 PetriNetUnfolderBase]: 8345/12779 cut-off events. [2024-06-27 19:04:16,365 INFO L125 PetriNetUnfolderBase]: For 668294/668302 co-relation queries the response was YES. [2024-06-27 19:04:16,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99379 conditions, 12779 events. 8345/12779 cut-off events. For 668294/668302 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 81725 event pairs, 1386 based on Foata normal form. 3/12774 useless extension candidates. Maximal degree in co-relation 99216. Up to 10899 conditions per place. [2024-06-27 19:04:16,583 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 393 selfloop transitions, 169 changer transitions 0/569 dead transitions. [2024-06-27 19:04:16,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 569 transitions, 11531 flow [2024-06-27 19:04:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:16,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:16,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:04:16,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531914893617021 [2024-06-27 19:04:16,585 INFO L175 Difference]: Start difference. First operand has 340 places, 505 transitions, 9701 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:04:16,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 569 transitions, 11531 flow [2024-06-27 19:04:19,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 569 transitions, 11269 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:19,659 INFO L231 Difference]: Finished difference. Result has 342 places, 508 transitions, 9956 flow [2024-06-27 19:04:19,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9451, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9956, PETRI_PLACES=342, PETRI_TRANSITIONS=508} [2024-06-27 19:04:19,660 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 291 predicate places. [2024-06-27 19:04:19,660 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 508 transitions, 9956 flow [2024-06-27 19:04:19,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:19,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:19,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:19,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:04:19,661 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:19,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash 449979754, now seen corresponding path program 8 times [2024-06-27 19:04:19,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:19,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542833973] [2024-06-27 19:04:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:19,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:22,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:22,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542833973] [2024-06-27 19:04:22,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542833973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:22,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:22,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:22,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395979246] [2024-06-27 19:04:22,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:22,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:22,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:22,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:22,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:22,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:22,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 508 transitions, 9956 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:22,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:22,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:22,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:27,080 INFO L124 PetriNetUnfolderBase]: 8391/12818 cut-off events. [2024-06-27 19:04:27,080 INFO L125 PetriNetUnfolderBase]: For 656495/656503 co-relation queries the response was YES. [2024-06-27 19:04:27,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100460 conditions, 12818 events. 8391/12818 cut-off events. For 656495/656503 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 81662 event pairs, 1243 based on Foata normal form. 4/12814 useless extension candidates. Maximal degree in co-relation 100298. Up to 9851 conditions per place. [2024-06-27 19:04:27,260 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 369 selfloop transitions, 202 changer transitions 0/578 dead transitions. [2024-06-27 19:04:27,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 578 transitions, 12123 flow [2024-06-27 19:04:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:04:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:04:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-27 19:04:27,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5319148936170213 [2024-06-27 19:04:27,262 INFO L175 Difference]: Start difference. First operand has 342 places, 508 transitions, 9956 flow. Second operand 9 states and 225 transitions. [2024-06-27 19:04:27,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 578 transitions, 12123 flow [2024-06-27 19:04:29,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 578 transitions, 11763 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:04:29,889 INFO L231 Difference]: Finished difference. Result has 345 places, 512 transitions, 10145 flow [2024-06-27 19:04:29,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9596, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10145, PETRI_PLACES=345, PETRI_TRANSITIONS=512} [2024-06-27 19:04:29,890 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 294 predicate places. [2024-06-27 19:04:29,890 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 512 transitions, 10145 flow [2024-06-27 19:04:29,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:29,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:29,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:29,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:04:29,905 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:29,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:29,905 INFO L85 PathProgramCache]: Analyzing trace with hash -864838050, now seen corresponding path program 9 times [2024-06-27 19:04:29,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:29,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575097553] [2024-06-27 19:04:29,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:29,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:32,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:32,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575097553] [2024-06-27 19:04:32,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575097553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:32,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:32,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:32,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889657434] [2024-06-27 19:04:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:32,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:32,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:32,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:32,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 512 transitions, 10145 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:32,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:32,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:32,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:37,416 INFO L124 PetriNetUnfolderBase]: 8503/12976 cut-off events. [2024-06-27 19:04:37,416 INFO L125 PetriNetUnfolderBase]: For 685593/685601 co-relation queries the response was YES. [2024-06-27 19:04:37,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103068 conditions, 12976 events. 8503/12976 cut-off events. For 685593/685601 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 82610 event pairs, 1240 based on Foata normal form. 6/12974 useless extension candidates. Maximal degree in co-relation 102904. Up to 9933 conditions per place. [2024-06-27 19:04:37,622 INFO L140 encePairwiseOnDemand]: 35/47 looper letters, 376 selfloop transitions, 214 changer transitions 0/597 dead transitions. [2024-06-27 19:04:37,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 597 transitions, 12556 flow [2024-06-27 19:04:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:04:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:04:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-27 19:04:37,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297872340425532 [2024-06-27 19:04:37,624 INFO L175 Difference]: Start difference. First operand has 345 places, 512 transitions, 10145 flow. Second operand 10 states and 249 transitions. [2024-06-27 19:04:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 597 transitions, 12556 flow [2024-06-27 19:04:40,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 597 transitions, 11998 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:40,855 INFO L231 Difference]: Finished difference. Result has 350 places, 525 transitions, 10430 flow [2024-06-27 19:04:40,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9643, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10430, PETRI_PLACES=350, PETRI_TRANSITIONS=525} [2024-06-27 19:04:40,869 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 299 predicate places. [2024-06-27 19:04:40,869 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 525 transitions, 10430 flow [2024-06-27 19:04:40,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:40,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:40,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:40,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:04:40,869 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:40,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:40,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1180941312, now seen corresponding path program 10 times [2024-06-27 19:04:40,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:40,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660449872] [2024-06-27 19:04:40,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:40,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:43,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:43,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:43,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660449872] [2024-06-27 19:04:43,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660449872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:43,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:43,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:04:43,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560916946] [2024-06-27 19:04:43,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:43,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:04:43,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:43,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:04:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:04:43,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:43,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 525 transitions, 10430 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:43,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:43,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:47,561 INFO L124 PetriNetUnfolderBase]: 8497/12994 cut-off events. [2024-06-27 19:04:47,561 INFO L125 PetriNetUnfolderBase]: For 681458/681466 co-relation queries the response was YES. [2024-06-27 19:04:47,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102887 conditions, 12994 events. 8497/12994 cut-off events. For 681458/681466 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 83023 event pairs, 1418 based on Foata normal form. 4/12990 useless extension candidates. Maximal degree in co-relation 102721. Up to 11331 conditions per place. [2024-06-27 19:04:47,754 INFO L140 encePairwiseOnDemand]: 34/47 looper letters, 424 selfloop transitions, 150 changer transitions 0/581 dead transitions. [2024-06-27 19:04:47,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 581 transitions, 12010 flow [2024-06-27 19:04:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:04:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:04:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:04:47,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5398936170212766 [2024-06-27 19:04:47,756 INFO L175 Difference]: Start difference. First operand has 350 places, 525 transitions, 10430 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:04:47,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 581 transitions, 12010 flow [2024-06-27 19:04:50,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 581 transitions, 11544 flow, removed 73 selfloop flow, removed 6 redundant places. [2024-06-27 19:04:50,711 INFO L231 Difference]: Finished difference. Result has 352 places, 525 transitions, 10271 flow [2024-06-27 19:04:50,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9964, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10271, PETRI_PLACES=352, PETRI_TRANSITIONS=525} [2024-06-27 19:04:50,714 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 301 predicate places. [2024-06-27 19:04:50,714 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 525 transitions, 10271 flow [2024-06-27 19:04:50,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:50,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:04:50,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:04:50,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:04:50,715 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:04:50,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:04:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1749271734, now seen corresponding path program 10 times [2024-06-27 19:04:50,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:04:50,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724681929] [2024-06-27 19:04:50,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:04:50,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:04:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:04:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:04:53,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:04:53,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724681929] [2024-06-27 19:04:53,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724681929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:04:53,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:04:53,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:04:53,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127245560] [2024-06-27 19:04:53,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:04:53,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:04:53,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:04:53,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:04:53,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:04:53,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:04:53,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 525 transitions, 10271 flow. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:04:53,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:04:53,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:04:53,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:04:57,395 INFO L124 PetriNetUnfolderBase]: 8494/13016 cut-off events. [2024-06-27 19:04:57,396 INFO L125 PetriNetUnfolderBase]: For 672120/672128 co-relation queries the response was YES. [2024-06-27 19:04:57,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101386 conditions, 13016 events. 8494/13016 cut-off events. For 672120/672128 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 83514 event pairs, 1431 based on Foata normal form. 3/13011 useless extension candidates. Maximal degree in co-relation 101219. Up to 11356 conditions per place. [2024-06-27 19:04:57,627 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 420 selfloop transitions, 146 changer transitions 0/573 dead transitions. [2024-06-27 19:04:57,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 573 transitions, 11655 flow [2024-06-27 19:04:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:04:57,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:04:57,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:04:57,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547112462006079 [2024-06-27 19:04:57,629 INFO L175 Difference]: Start difference. First operand has 352 places, 525 transitions, 10271 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:04:57,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 573 transitions, 11655 flow [2024-06-27 19:05:00,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 573 transitions, 11340 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 19:05:00,347 INFO L231 Difference]: Finished difference. Result has 352 places, 525 transitions, 10260 flow [2024-06-27 19:05:00,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=47, PETRI_DIFFERENCE_MINUEND_FLOW=9956, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10260, PETRI_PLACES=352, PETRI_TRANSITIONS=525} [2024-06-27 19:05:00,355 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 301 predicate places. [2024-06-27 19:05:00,355 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 525 transitions, 10260 flow [2024-06-27 19:05:00,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:00,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:05:00,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:05:00,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:05:00,356 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-06-27 19:05:00,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:05:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash 44531002, now seen corresponding path program 9 times [2024-06-27 19:05:00,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:05:00,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721589914] [2024-06-27 19:05:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:05:00,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:05:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:05:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:05:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:05:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721589914] [2024-06-27 19:05:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721589914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:05:03,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:05:03,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:05:03,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212768161] [2024-06-27 19:05:03,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:05:03,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:05:03,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:05:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:05:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:05:03,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 47 [2024-06-27 19:05:03,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 525 transitions, 10260 flow. Second operand has 9 states, 9 states have (on average 12.88888888888889) internal successors, (116), 9 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:05:03,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:05:03,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 47 [2024-06-27 19:05:03,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:05:07,626 INFO L124 PetriNetUnfolderBase]: 8491/13082 cut-off events. [2024-06-27 19:05:07,626 INFO L125 PetriNetUnfolderBase]: For 675307/675309 co-relation queries the response was YES. [2024-06-27 19:05:07,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101436 conditions, 13082 events. 8491/13082 cut-off events. For 675307/675309 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 84699 event pairs, 1413 based on Foata normal form. 1/13081 useless extension candidates. Maximal degree in co-relation 101268. Up to 11101 conditions per place. [2024-06-27 19:05:07,864 INFO L140 encePairwiseOnDemand]: 36/47 looper letters, 419 selfloop transitions, 171 changer transitions 0/597 dead transitions. [2024-06-27 19:05:07,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 597 transitions, 11920 flow [2024-06-27 19:05:07,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:05:07,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:05:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 19:05:07,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.557919621749409 [2024-06-27 19:05:07,866 INFO L175 Difference]: Start difference. First operand has 352 places, 525 transitions, 10260 flow. Second operand 9 states and 236 transitions. [2024-06-27 19:05:07,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 597 transitions, 11920 flow